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Our study aimed to compare the essential oil (EO) concentration and composition of several Apiaceae species growing in the Northern region of Vietnam. The yields of EOs from materials ranged from 0.03% (root EO of Angelica acutiloba and aerial parts EO of Heracleum bivittatum)−0.27% (leaf EO of Xyloselinum vietnamense). Gas chromatography-mass spectrometry (GC-MS) allowed the identification of 74 components in the EOs of six Apiaceae species, making up 94.4%–100.0% of the oils. In EO from Angelica acutiloba , (Z)-ligustilide accounted for an extremely large proportion (94.9%). EO of Angelica pubescens was dominated by six characteristic components including α-pinene (21.5%), β-phellandrene (18.1%), p -cymene (12.2%), 3-methylnonane (8.7%), o -cymene (8.1%), and D-sylvestrene (6.2%). The EO from Cryptotaenia japonica was characterized by high amounts of α-selinene (48.7%), β-selinene (23.7%), and trans -β-farnesene (5.4%). The EOs from leaves and stems of Xyloselinum vietnamense were characterized by high concentrations of sabinene (69.8% and 33.8%), 4-terpineol (8.7% and 7.4%) and β-pinene (4.0% and 6.5%) while EOs from aerial parts and root of Xyloselinum leonidii comprise four characteristic monoterpenes including α-pinene (28.2% and 52.8%), β-pinene (7.9% and 10.3%), β-phellandrene (7.6% and 15.3%), and sabinene (3.0% and 4.1%). Additionally, cryptone is also one of the major components in the EO of Xyloselinum leonidii (13.2% in the aerial parts oil and 2. 8% in the root oil). In the EOs isolated from the aerial parts and root of Heracleum bivittatum , α-pinene (22.5% and 70.2%) and β-pinene (43.2% and 20.0%) were the predominant monoterpenes. Sabinene appeared in the EO from aerial parts of Heracleum bivittatum with a relatively high concentration (13.5%) while bornyl acetate (5.1%) was also one of the main components in the EO from its aerial parts but was not detected in other Apiaceae species in the present study. These databases help identify and control the quality of plant material studied from the family Apiaceae growing in Vietnam. [ABSTRACT FROM AUTHOR]

Two new neolignan sesquiterpenoids, chevalierinol A (1) and chevalierinol B (2), were isolated from the ethyl acetate extract of Magnolia chevalieri leaves, together with twelve known compounds (3–14). Their structures were elucidated by analysis of spectroscopic data including 1D, 2D and mass spectra and compared with the reported data. Compounds 1, 3, 4, 6, 7, 10 were evaluated for their inhibitory effect against lipopolysaccharide (LPS)-induced nitric oxide (NO) production in RAW264.7 macrophage cells. [ABSTRACT FROM AUTHOR]

A new 3-methoxybenzensulfonic acid 4-0-0-D-glucopyranoside (1), and ten known compounds (2-11) were isolated from the methanolic extract of the stems of Mallotus microcarpus. The cytotoxicity of the isolated compounds was evaluated by the MTT method. 3-Methoxybenzensulfonic acid 4-Ο-β-D- glucopyranoside (1) and methyl salicylate 2-rutinoside (5) showed strong cytotoxicity against EGFR-TKI-resistant human lung cancer A549 cells in comparison with camptothecin. Compound 1, leonuriside A (2), 3,4'-dihydroxypropiophenone 3-Ο-glucoside (6) and (lR,2S)-hovetrichoside A (10) inhibited the growth of human breast cancer MCF-7 cell line with IC₅₀ values in the range of 0.48-1.78 μM. This is the first report on the chemical composition and cytotoxic activity of M microcarpus.