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Composition of essential oils from ripe dried fruits of Peucedanum longifolium Waldst. & Kit. (PL) and P. aegopodioides (Boiss.) Vandas (PA) was investigated for the first time. Both taxa are distributed on the Balkan Peninsula, Asia Minor and Transcaucasia, and some authors include the last species in a separate genus, Rhizomatophora Pimenov [1]. Plant material was collected in Serbia, PL on Vis hill in Sićevo Gorge, PA in vicinity of Pirot, near village Basara. Oils were obtained by hydrodistillation in Clevenger-type apparatus; yields 0.91% (PL) and 0.02% (PA), w/w. GC-FID-MS analysis revealed presence of 46 components in PL oil and 48 in PA oil, accounting for 98.0% and 90.0% of total oils. PL oil was dominated by monoterpene hydrocarbons (74.4%), mainly α-phellandrene (26.2%), β-phellandrene + limonene (21.0%) and myrcene (9.5%), followed by sesquiterpene hydrocarbons (17.9%), mainly germacrene B (9.5%). On the other hand, most abundant in PA oil were non-terpenic aliphatic hydrocarbons (46.1%), mainly n-undecane (16.5%) and n-nonane (11.3%). However, this oil also contained significant amounts of both non-oxygenated and oxygenated sesquiterpenes (11.4% and 13.6%), with (E)-sesquilavandulol being most prominent (10.0%). Previously, composition of essential oils from some other plant parts of PL was investigated. For example, essential oil from fresh leaves and young stems of this plant was dominated by sesquiterpene β-elemene (24.7%) and monoterpene (E)-β-ocimene (11.7%) [2], which were present in small amounts in dried fruit oil investigated in current study (0.5% and 0.6%). 5th International Conference on Natural Products Utilization: from Plants to Pharmacy Shelf - ICNPU-2023, Sts. Constantine & Helena, Bulgaria, 30th May to 2nd June 2023

Composition of dichloromethane and methanol extracts from roots and fruits of Prangos trifida (Mill.) Herrnst. & Heyn s.l. (collected in Sićevo Gorge, Serbia in 2020) was investigated. Extracts were obtained by bimaceration, firstly with dichloromethane, then with methanol; solvents were removed under reduced pressure. GC-FID-MS analysis, conducted after saponification and methylation of samples, showed that palmitic, oleic and linoleic (14.2-51.8%) were dominant fatty acids in root dichloromethane extract, and oleic, linoleic and petroselinic in oily supernatant of fruit dichloromethane extract (10.2-49.9%); in both samples 16 fatty acids were identified. Dominant phytosterols, investigated by GC-FID-MS after unsaponifiable fractions silanization, were β-sitosterol (48.2 and 25.1%) and stigmasterol (14.9 and 12.8%). LC-DAD-MS analysis of dichloromethane and methanol extracts revealed presence of 7-11 furanocoumarins, including oxypeucedanin and imperatorin (up to 105.9 and 49.2 mg/g in fruit dichloromethane extract crystalline precipitate), followed by smaller amounts of oxypeucedanin hydrate, isoimperatorin, heraclenol, heraclenin and/or xanthotoxin. All extracts were rich in one 2',3'-dihydrofuranocoumarin derivative. Previously, such derivative, prantschimgin, as well as imperatorin and isoimperatorin were isolated from this plant and their in vitro anti-inflammatory activity was demonstrated [1]. In current investigation, in root methanol extract, chlorogenic (31.6 mg/g), two dicaffeoylquinic (12.8 and 48.1 mg/g), and smaller amounts of one caffeoylquinic and one feruloylquinic acids were also determined. Furthermore, low quantities of chlorogenic and one dicaffeoylquinic acid and two quercetin-type flavonoids were detected in fruit methanol extract, and one methylluteolin-type flavonoid in both methanol extracts. 5th International Conference on Natural Products Utilization: from Plants to Pharmacy Shelf - ICNPU-2023, Sts. Constantine & Helena, Bulgaria, 30th May to 2nd June 2023

Antimicrobial and cytotoxic activities were tested for dried MeOH extracts of Hieracium calophyllum (CAL), H. coloriscapum (COL), H. pseudoschenkii (PSE), H. valdepilosum (VAL) and H. glabratum (GLA) herbs (flowering aerial parts), their 2 sesquiterpene lactones (SLs) 8-epiixerisamine A and crepiside E, and dried CH2Cl2 extract of H. scheppigianum (SCH) herb. In microdilution test, extracts showed activity on all tested microorganisms (8 bacteria, 10 fungi). The best effect was exhibited by SCH and CAL on Salmonella Typhimurium (MIC=1.7– 2.5 mg/mL MBC=3.4–5.0 mg/mL), and SCH and VAL on Candida albicans (MIC=2.5 mg/mL MFC=5.0 mg/mL). SLs showed notable effect on all tested fungi Aspergillus ochraceus, Penicillium funiculosum, C. albicans and C. krusei (MIC=0.15–0.4 mg/mL MFC=0.3–0.8 mg/mL). In MTT test, extracts inhibited growth of all tested cancer cells (HeLa, LS174 and A549), with the best effect on HeLa (IC50=148.1 μg/mL for SCH, and 152.3– 303.2 μg/mL for MeOH extracts); both SLs were active against HeLa cells (IC50=46.2 μg/mL for crepiside E and 103.8 μg/mL for 8-epiixerisamine A). Extracts and SLs showed good safety profile on normal MRC-5 cells.

Stachys milanii Petrović (Lamiaceae) is an endemic of central and eastern part of Balkan Peninsula, growing mainly in river valleys on semi-saline soils, often along the edge of cereal fields and abandoned arable lands. It is a critically endangered and strictly protected species in Serbia, with just one proven habitat (1). So far it was investigated on herb essential oil composition and antimicrobial activity, and on fatty acid composition of seeds (2). Aim of this work was to investigate antiradical potential and phenolic constituents of dry methanol herb extract. Aerial flowering parts (herb) of S. milanii were collected in North Macedonia (Ovče Pole). Powdered, dried plant material was extracted by bimaceration with chloroform, and then with methanol. Obtained dry methanol extract was used for further analysis. Using appropriate spectrophotometric procedure strong, concentration-dependant anti-DPPH activity of extract was observed (SC50=34.15 μg/mL). Also spectrophotometrically, using Folin-Ciocalteu reagent, significant total phenolics content (0,47 mg gallic acid/mg dry extract) was determined. In TLC-DPPH test observed yellow zones indicated presence of few compounds which strongly neutralized purple DPPH radical. LC-MS analysis revealed presence of one phenolic acid, four phenylethanol glycosides, eight flavonoid glycosides derivatives of 8-hydroxyflavones, and one apigenin glycoside. Using commercial standards in extract were identified and quantified: chlorogenic acid (1.63%) and acteoside (2.65%), as the main phenylethanoid. In 8-hydroxyflavones fraction six hypolaetine and two isoscutellarein derivatives were present; using compounds previously isolated from S. alpina subsp. dinarica Murb. herb, 4'-O-methylhypolaetine-7-O-[6'''-acetylallosyl(1®2)]-glucopyranoside and isoscutellarein-7-O-[6'''-acetylallosyl(1®2)]-glucopyranoside were identified, representing the most prominent flavonoids in investigated extract, respectively. References 1. Niketić M, Diklić N. Stachys milanii Petrović. In: Stevanović V. (Ed.) Red Book of Flora of Serbia 1 - Extinct and Critically Endangered Taxa. Belgrade: Ministry for the Protection of Natural Resources and the Environment, Faculty of Biology, University of Belgrade, Institution for Protection of Nature of the Republic of Serbia. 1999; pp. 211-3, 466-7. 2. Stojanovic G, Ligon AP, Smelcerovic A, Lazarevic J, Spiteller M, Palic R. Fatty acids of Stachys milanii seeds. Chem Nat Comp 2007;43(4):380-3. Acknowledgements This research was funded by the Ministry of Education, Science and Technological Development, Republic of Serbia through Grant Agreement with University of Belgrade-Faculty of Pharmacy No: 451-03-68/2022-14/200161. Stachys milanii Petrović (Lamiaceae) je endemit centralnog i istočnog dela Balkanskog poluostrva koji raste pretežno u dolinama reka na poluslanim zemljištima, često i po obodu žitnih polja i po napuštenim oranicama. U Republici Srbiji je kritično ugrožena i strogo zaštićena vrsta, sa samo jednim zabeleženim staništem (1). Biljka je do sada ispitivana u pogledu sastava i antimikrobne aktivnosti etarskog ulja herbe i kompozije masnih kiselina semena (2). Cilj ovog rada bio je da se ispitaju antiradikalski potencijal i fenolni sastojci suvog metanolnog ekstrakta herbe. Nadzemni delovi S. milanii u cvetu prikupljeni su u Severnoj Makedoniji (Ovče Pole). Sprašen, osušen biljni materijal je ekstrahovan posupkom bimaceracije najpre hloroformom, a zatim metanolom. Dobijeni suvi metanolni ekstrakt korišćen je za dalju analizu. Odgovarajućim spektrofotometrijskim postupkom utvrđena je snažna, koncentraciono-zavisna anti-DPPH aktivnost ekstrakta (SC50=34,15 μg/mL). Spektrofotometrijski, korišćenjem Folin-Ciocalteu reagensa, utvrđen je i značajan sadržaj ukupnih polifenola (0,47 mg galne kiseline/mg suvog ekstrakta). U TLC-DPPH testu uočene žute zone ukazale su na prisustvo većeg broja jedinjenja koja snažno neutrališu ljubičasti DPPH-radikal. LC-MS analizom u ekstraktu su detektovani jedna fenolkarboksilna kiselina, četiri feniletanska heterozida, osam flavonoidnih heterozida derivata 8-hidroksiflavona i jedan heterozid apigenina. Korišćenjem komercijalnih standarda identifikovni su i kvantifikovani hlorogenska kiselina (1,63%) i akteozid (2,65%), kao glavni feniletanski heterozid. Frakciju derivata 8-hidroksiflavona činilo je šest heterozida hipolaetina i dva heterozida izoskutelareina; korišćenjem jedinjenja prethodno izolovanih iz herbe S. alpina subsp. dinarica Murb., identifikovani su 4'-O-metilhipolaetin-7-O-[6'''-acetilalozil(12)]- glukopiranozid i izoskutelarein 7-O-[6'''-acetilalozil(12)]-glukopiranozid, koji su ujedno predstavljali i najzastupljnije flavonoide u ekstraktu, redom. VIII Kongres farmaceuta Srbije sa međunarodnim učešćem, 12-15.10.2022. Beograd

In this study composition and antimicrobial activity of essential oils of roots, leaves, stems and fruits of Prangos trifida (Mill.) Herrnst. & Heyn s.l. (Apiaceae) were investigated. Plant material was collected in Sićevo Gorge (Kusača) in 2020. Essential oils were isolated by hydrodistillation in Clevenger-type apparatus and analyzed by GC-FID-MS. Antimicrobial activity was tested by microdilution method against food contaminants: Gram-positive (Staphylococcus aureus, Bacillus cereus and Listeria monocytogenes), Gram-negative bacteria (Escherichia coli, Enterobacter cloacae and Salmonella Typhimurium), and molds (Aspergillus fumigatus, A. niger, A. versicolor, Penicillium funiculosum, P. verrucosum var. cyclopium and Trichoderma harzianum); artificial food preservatives E211 and E224 were used as controls. Dominant constituents of essential oils were monoterpenes (66.2-87.2%). Terpinolene (36.2%) and p-cymene (11.5%) prevailed in root oil, (E)-β-ocimen (23.2%) and terpinolene (18.1%) in leaf oil, p-cimen-8-ol (21.8%) and p-cimen (14.1%) in stem oil, and p-cimen (25.4%) and limonene (14.4%) in fruit oil. Essential oils showed significant antifungal activity (MIC=0.10-0.78 mg/mL; MFC=0.20-1.56 mg/mL), better compared to both tested commercial preservatives, and interesting antibacterial activity (MIC=0.20-6.25 mg/mL; MBC=0.39-12.5 mg/mL), which was in the case of root and stem oils better than activity of both preservatives against S. aureus and B. cereus. It should be noted that composition of tested oils was in accordance with composition of the oils of this plant from vicinity of Madrid (1) and from Crimea (2), while their antimicrobial activity was tested in this work for the first time. Obtained results justify further research of P. trifida essential oils as new natural food preservatives. Cilj ovog rada bio je da se ispitaju hemijski sastav i antimikrobna aktivnost etarskih ulja korena, listova, stabljika i plodova Prangos trifida (Mill.) Herrnst. & Heyn s.l. (Apiaceae). Biljni materijal je prikupljen na području Sićevačke klisure (Kusača) 2020. god. Etarska ulja su dobijena destilacijom vodenom parom u aparaturi po Klevendžeru i analizirana metodom GC-FID-MS. Antimikrobna aktivnost testirana je mikrodilucionom metodom na kontaminantima hrane: Gram-pozitivnim (Staphylococcus aureus, Bacillus cereus i Listeria monocytogenes), Gram-negativnim bakterijama (Escherichia coli, Enterobacter cloacae i Salmonella Typhimurium), i plesnima (Aspergillus fumigatus, A. niger, A. versicolor, Penicillium funiculosum, P. verrucosum var. cyclopium i Trichoderma harzianum); kao kontrole korišćeni su sintetski konzervansi E211 i E224. Dominantni sastojci etarskih ulja bili su monoterpeni (66,2-87,2%). Najzastupljeniji u ulju korena bili su terpinolen (36,2%) i p-cimen (11,5%), u ulju listova (E)-β-ocimen (23,2%) i terpinolen (18,1%), u ulju stabljika p-cimen- 8-ol (21,8%) i p-cimen (14,1%), a u ulju plodova p-cimen (25,4%) i limonen (14,4%). Etarska ulja su pokazala značajnu antifungalnu aktivnost (MIK=0,10-0,78 mg/mL; MFK=0,20-1,56 mg/mL), bolju u poređenju sa oba testirana komercijalna konzervansa, i interesantnu antibakterijsku aktivnost (MIK=0,20-6,25 mg/mL; MBK=0,39-12,5 mg/mL), koja je u slučaju ulja korena i stabljika prema S. aureus i B. cereus bila bolja u odnosu na oba konzervansa. Treba istaći da je sastav ispitivanih etarskih ulja bio u skladu sa sastavom ulja ove biljke iz okoline Madrida (1) i sa Krima (2), dok je njihova antimikrobna aktivnost ispitivana u ovom radu po prvi put. Dobijeni rezultati predstavljaju dobru osnovu za dalja istraživanja etarskih ulja P. trifida kao novih prirodnih konzervanasa. VIII Kongres farmaceuta Srbije sa međunarodnim učešćem, 12-15.10.2022. Beograd

The genus Hieracium L. s. str. (Cichorieae, Asteraceae) is one of the most taxonomically complex genera of flowering plants. Chemosystematic significance of triterpenes especially for Asteraceae genera is scarcely assessed. The subject of this research are 28 Hieracium species from Balkan Peninsula (mostly collected at Mt Durmitor, Montenegro): 12 principal belonging to sections Pannosa, Naegeliana, Drepanoidea and Villosa, and 16 hybridogenous originated from the species from those four sections and Glauciformia, Hieracium, Prenanthoidea and/or Italica. Previously, in dried dichloromethane extracts of flowering aerial plant parts, α-amyrin and α-amyrin acetate, as well as β-amyrin, β-amyrin acetate and/or lupeol acetate were identified and quantified using GC-FID-MS. The aim was to evaluate chemosystematic significance of these five triterpenes using multivariate statistical methods (principal components analysis-PCA and non-metric multidimensional scaling-nMDS). Statistical analysis supported the current taxonomical classification of the investigated species, despite overlapping of certain groups. In PCA, all five triterpenes significantly contributed to the differences between the species. Moreover, lupeol acetate could be a significant chemosystematic marker for the most of principal species belonging to the section Pannosa, as well as for some hybridogenous species between H. gymnocephalum Gris. ex Pant. and the members from the other sections. 14th Symposium on the Flora of Southeastern Serbia and Neighboring Regions, Kladovo, 26th to 29th June 2022

The wood-sage (woodland germander) Teucrium scorodonia L. is widespread in European Atlantic coast and in the western part of Central Europe, with some isolated populations in Mediterranean. Recently discovered population on the territory of Serbia, in the valley of Štavica river (vicinity of Loznica), represents the most eastern enclave in the species range. Preliminary chemical analysis of aerial flowering parts and its dried ethanol and hydroethanol (70% v/v) extracts, and assessment of antioxidant potential of selected (hydroethanol) extract were performed. Using appropriate spectrophotometrical methods, total polyphenols in herb (3.48%, expressed as pyrogallol), ethanol and hydroethanol extracts (100.05 and 96.65 mg gallic acid equivalents - GAE/g), tannins in herb (0.96%, expressed as pyrogallol), ethanol and hydroethanol extracts (11.86 and 12.31 mg GAE/g), flavonoids in herb, ethanol and hydroethanol extracts (0.19%, 0.83% and 0.74%, expressed as hyperoside) were quantified. Also, in ethanol and hydroethanol extracts dihydroxycinnamic acid derivatives were determined (8.96% and 8.37%, expressed as acteoside). By LC-MS, in selected (hydroethanol) extract, four flavonoid and five phenylethanoid glycosides were detected; verbascoside (acteoside) was identified and quantified (4.42%) using external standard. This extract exhibited significant total antioxidant activity (1.37 mmol Fe2+/g) and moderate anti-DPPH potential (SC50=51.28 μg/mL). 14th Symposium on the Flora of Southeastern Serbia and Neighboring Regions, Kladovo, 26th to 29th June 2022

In this work, composition and antioxidant activity of dry dichloromethane and methanol extracts of Heracleum ternatum Velen. (Apiaceae) leaves and flowers from Mt Durmitor (Montenegro) were investigated. Using LC-MS, five furanocoumarins were identified in leaf dichloromethane extract (accounting for 23.00 mg/g of dry extract) and eight in flower dichloromethane extract (60.47 mg/g). Dominant in leaf extract was heraclenin (11.64 mg/g), followed by imperatorin (5.90 mg/g), and in flower extract heraclenol (17.55 mg/g), followed by heraclenin (15.04 mg/g). LC-MS analysis revealed eight flavonol glycosides in leaf methanol extract (accounting for 16.18 mg/g of dry extract) and 11 in flower methanol extract (65.82 mg/g), as well as chlorogenic acid in both extracts (4.72 mg/g and trace, respectively). Among detected flavonoids, dominant was quercetin 7-O-rhamnosyl 3-O-glucoside (vincetoxicoside A; 7.95 and 16.77 mg/g), followed by biosides and triosides of kaempferol and methylquercetin. Content of total polyphenols, determined spectrophotometrically using Folin-Ciocalteu reagent, was 87.29 and 98.12 mg of gallic acid equivalents/g of dry methanol extracts. Among methanol extracts, polyphenol richer flower extract showed higher, spectrophotometrically determined, total antioxidant and anti-DPPH activities compared to leaf extract (FRAP=0.80 and 0.65 mmol Fe2+/g; DPPH SC50=83.12 and 90.95 μg/mL). Dichloromethane extracts showed lower anti-DPPH activity (SC50=860.58 and 515.76 μg/mL). 14th Symposium on the Flora of Southeastern Serbia and Neighboring Regions, Kladovo, 26th to 29th June 2022

Chamaecytisus heuffelii subsp. jankae (Velen.) Niketić (Fabaceae) is a dwarfish shrub, which range includes eastern part of the Balkan Peninsula (Albania, Bulgaria, Serbia) (1). The aim of the investigation was to chemically characterize aerial flowering parts of this plant: the dried methanol extract (TM), its alkaloid (AF) and non-alkaloid (NAF) fractions, and to assess their ability and the ability of detected flavonoids to inhibit enzymes acetylcholinesterase (AChE) and butyrylcholinesterase (BChE), in vitro in the Ellman spectrophotometric test. Plant material was collected in eastern Serbia (Jelašnička Klisura gorge), dried, powdered and extracted with methanol, after dichloromethane pre-extraction. Using solvents of different polarities and pH value, AF (yield 14.35%) and NAF (yield 57.78%) were obtained from TM. By LC-MS analysis, flavonoids luteolin-8-C- glucosylpentoside (159.81 mg/g), genistin (22.38 mg/g), vitexin (6.32 mg/g), rutin (4.25 mg/g), and genistein (0.86 mg/g) were detected and quantified in TM, while luteolin-8-C- glucosylpentoside (212.70 mg/g), rutin (1.38 mg/g), and genistin (1.03 mg/g) in NAF. Using GC-FID-MS analysis, quinolizidine alkaloids sparteine, 17-oksosparteine, and lupanine were identified in AF. TM and NAF exhibited significant and comparable anti-cholinesterase activity (IC50AChE 0.54 and 0.72 mg/mL; IC50BuChE 0.45 and 0.68 mg/mL). All detected flavonoids evinced the ability to inhibit enzymes; the most active were genistein and vitexin (IC50AChE 54.75 and 88.35 μg/mL; IC 50BuChE 27.83 and 49.77 μg/mL). Considering the quinolizidine alkaloids toxicity and AF poor anti-cholinesterase activity, it might be concluded, regarding safety profile and medical potential, that the fraction of the herb methanol extract, flavonoid-rich and alkaloid-free (NAF), is good candidate for further research. Chamaecytisus heuffelii subsp. jankae (Velen.) Niketić (Fabaceae) je polužbun, koji raste na području istočnog dela Balkanskog poluostrva (Albanija, Bugarska, Srbija) (1). Cilj istraživanja bio je da se izvrši hemijska karakterizacija nadzemnih delova u cvetu ove biljke: suvog metanolnog ekstrakta (TM), njegove alkaloidne (AF) i frakcije bez alkaloida (NAF), i da se in vitro, u Ellmanov-om spektrofotomerijskom testu, ispita njihova sposobnost, kao i sposobnost detektovanih flavonoida da inhibiraju enzime acetilholinesterazu (AChE) i butirilholinesterazu (BChE). Biljni materijal je sakupljen u istočnoj Srbiji (Jelašnička klisura), osušen, samleven i ekstrahovan metanolom, nakon pre-ekstrakcije dihlormetanom. Primenom rastvarača različite polarnosti uz promenu pH vrednosti, iz TM su dobijene AF (prinos 14,35%) i NAF (prinos 57,78%). LC-MS analizom, u TM detektovani su i kvanitikovani flavonoidi luteolin-8-C-glukozilpentozid (159,81 mg/g), genistin (22,38 mg/g), viteksin (6,32 mg/g) i rutin (4,25 mg/g) i genistein (0,86 mg/g), a u NAF luteolin-8-C- glukozilpentozid (212,70 mg/g), rutin (1,38 mg/g) i genistin (1,03 mg/g). GC-FID-MS analizom, u AF identifikovani su hinolizidinski alkaloidi spartein, 17-oksospartein i lupanin. TM i NAF ispoljili su značajnu i uporedivu antiholinesteraznu aktivnost (IC50AChE 0,54 i 0,72 mg/mL; IC 50BChE 0,45 i 0,68 mg/mL). Svi detektovani flavonoidi su pokazali sposobnost da inhibiraju enzime; najaktivniji su bili genistein i viteksin (IC 50AChE 54,75 i 88,35 μg/mL; IC 50BuChE 27,83 i 49,77 μg/mL). Uzimajući u obzir toksič nost hinolizidinskih alkaloida i slabu antiholinesteraznu aktivnost AF, mož e se zaključ iti da je frakcija metanolnog ekstrakata herbe bogata flavonoidima i oslobođena alkaloida (NAF), u pogledu bezbednosnog profila i lekovitog potencijala dobar kandidat za dalja ispitivanja. VIII Kongres farmaceuta Srbije sa međunarodnim učešćem, 12-15.10.2022. Beograd

INTRODUCTION: Cultivated parsnip (Pastinaca sativa subsp. sativa L., Apiaceae) root is a well-known vegetable, common ingredient of soups, stews, salads, casseroles etc. Besides, its leaves and young shoots can be added to soups and fruits are used as a condiment. Furthermore, young shoots of wild-growing parsnips, e.g. P. sativa subsp. urens (Req. ex Godr.) Čelak., are consumed pickled or in salads or soups and it is considered that their essential oil acts as a natural preservative. OBJECTIVES: To investigate and compare the antimicrobial activity of the essential oils obtained from the roots, leaves, stems, flowers and fruits of cultivated P. sativa subsp. sativa and wild-growing P. sativa subsp. urens collected in Serbia. Furthermore, the most active essential oil constituents (against the most susceptible microorganisms) were predicted in silico. METHOD / DESIGN: Minimum inhibitory concentrations (MICs) and minimum bactericidal/fungicidal concentrations (MBCs/MFCs) of the essential oils (isolated by hydrodistillation using Clevenger-type apparatus) were determined by microdilution method against three Gram-positive bacteria: Staphylococcus aureus ATCC 11632, Bacillus cereus clinical isolate and Listeria monocytogenes NCTC 7973, three Gram-negative bacteria: Escherichia coli ATCC 25922, Salmonella Typhimurium ATCC 13311 and Enterobacter cloacae ATCC 35030, three Candida standard strains: C. albicans ATCC 10231, C. tropicalis ATCC 750 and C. parapsilosis ATCC 22019, and three Candida isolates from oral cavity: C. albicans 475/15, C. krusei H1/16 and C. glabrata 4/6/15. Pharmacokinetic properties of the compounds present in at least one oil in the quantity ≥ 1% (determined by GC-FID and GC-MS) were initially evaluated using SwissADME web tool and molecular docking was performed using AutoDock Vina 1.1.2 (interactions were visualized using Discovery Studio Visualizer 2019). RESULTS: All the investigated essential oils of the two Pastinaca sativa subspecies were able to reduce the growth of different tested Candida strains (MIC range 0.25-2 mg/mL; MFC range 0.5-4 mg/mL). The most promising activity was observed for both root oils (MIC range 0.25-1 mg/mL; MFC range 0.5-2 mg/mL). Among investigated Candida strains, C. parapsilosis strain was the most sensitive to these essential oils (MIC range 0.25-1 mg/mL; MFC range 0.5-2 mg/mL). The antibacterial activity of the tested essential oils was lower compared to their anticandidal potential (MIC range 1-4 mg/mL; MBC range 2-8 mg/mL). Thirty compounds were present in at least one oil in the quantity ≥ 1%. Estimation of pharmacokinetic properties using SwissADME tool suggested that 23 of these compounds are inhibitors of some of the cytochrome P450 system isoenzymes. This fact led to assumption that they could also act against fungal sterol 14α-demethylase (CYP51), which is a common target of antifungal drugs (e.g., ketoconazole). Thus, the compounds (3D structures downloaded from PubChem) were docked to the active site of this enzyme (downloaded from Protein Data Bank, PDB code 5TZ1). The highest affinities were predicted for sesquiterpenes caryophyllene oxide, (E)-caryophyllene, germacrene D, α-copaene, β-bourbonene and δ-cadinene (free binding energies from -9.4 to -8.7 kcal/mol; ketoconazole -11.6 kcal/mol). These compounds were present in somewhat lower quantities in the essential oils (≤ 9.9%). For dominant compounds of the tested essential oils, e.g. myristicin, γ-palmitolactone and octyl butanoate a bit lower affinities were predicted (free binding energies from -7.3 to -5.8 kcal/mol). Tested compounds mostly docked near the heme of the enzyme and formed hydrophobic interactions with the amino acid residues of the active site. According to SwissADME tool, four of five most active compounds have low absorption from gastrointestinal tract and higher skin permeation value, while caryophyllene oxide and three dominant compounds have high absorption and lower skin permeation value (similarly to ketoconazole). CONCLUSIONS: Investigated parsnips represent sources of essential oils and compounds with anticandidal activity. The International Bioscience Conference and the 8th International PSU – UNS Bioscience Conference - IBSC2021, Novi Sad, 25th to 26th November 2021