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Your search keyword '"Xia XK"' showing total 5 results
Start Over Author "Xia XK" Topic rhizophoraceae
5 results on '"Xia XK"'

1. The bioactive metabolites of the mangrove endophytic fungus Talaromyces sp. ZH-154 isolated from Kandelia candel (L.) Druce.

Author

Liu F, Cai XL, Yang H, Xia XK, Guo ZY, Yuan J, Li MF, She ZG, and Lin YC

Subjects
Anthracenes chemistry, Anthracenes isolation & purification, Anthracenes pharmacology, Antineoplastic Agents chemistry, Antineoplastic Agents pharmacology, Benzopyrans chemistry, Benzopyrans pharmacology, Cell Line, Tumor drug effects, Crystallography, X-Ray, Humans, Magnetic Resonance Spectroscopy, Molecular Structure, Mycorrhizae metabolism, Plant Bark, Plant Stems, X-Ray Diffraction, Antineoplastic Agents isolation & purification, Benzopyrans isolation & purification, Rhizophoraceae chemistry, Talaromyces metabolism
Abstract

Bioactivity-directed fractionation of the extract of the mangrove endophytic fungus Talaromyces sp. ZH-154, which was isolated from the stem bark of Kandelia candel (L.) Druce, Rhizophoraceae, afforded two new metabolites, 7-epiaustdiol ( 1) and 8-O-methylepiaustdiol ( 2), together with the known compounds, stemphyperylenol ( 3), skyrin ( 4), secalonic acid A ( 5), emodin ( 6), and norlichexanthone ( 7). Their structures were elucidated on the basis of spectroscopic evidences including CD, MS, and 1D, 2D NMR techniques. The absolute configuration of 1 was unequivocally determined by single-crystal X-ray diffraction. All isolated compounds were evaluated for their antimicrobial and in vitro cytotoxic activities., (Georg Thieme Verlag KG Stuttgart . New York.)

Published
2010
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2. [The secondary metabolites of the mangrove endophytic fungi ZZF13 and Guignardia sp. 4382 from the South China Sea].

Author

Xia XK, Liu CH, Yuan WP, Wang XJ, Meng XM, Zhang MS, She ZG, and Lin YC

Subjects
Ascomycota chemistry, Ascomycota growth & development, Butanones chemistry, China, Fungi metabolism, Isocoumarins chemistry, Magnetic Resonance Spectroscopy, Molecular Structure, Oceans and Seas, Plant Bark chemistry, Butanones isolation & purification, Fungi chemistry, Isocoumarins isolation & purification, Rhizophoraceae microbiology
Abstract

Objective: The secondary metabolites of the fungus ZZF13 isolated from the leaves of the mangrove sample Kandelia candel in Zhanjiang and Guignardia sp. 4382 isolated from bark of Kandelia candel (endophyte) of Mai Po, Hong Kong were studied., Methods: The compounds were isolated by siliga gel, and their structures were identified by IR, MS and NMR., Results: Four compounds were isolated from the culture of this strain. Their structures were identified as Bacillpsporin C (1), 5-carboxymellein (2), 5-methylmellein (3) and 1-(2,6-dihydroxyphenyl) butanone (4)., Conclusion: The compounds 2 - 4 are isolated from the Guignardia sp. of Marine fungi for the first time.

Published
2009

3. Structure elucidation of three diphenyl ether derivatives from the mangrove endophytic fungus SBE-14 from the South China Sea.

Author

Liu F, Li Q, Yang H, Cai XL, Xia XK, Chen SP, Li MF, She ZG, and Lin YC

Subjects
Culture Media analysis, Fermentation, Magnetic Resonance Spectroscopy, Spectrometry, Mass, Electrospray Ionization, Spectrophotometry, Infrared, Spectroscopy, Fourier Transform Infrared, Benzoates chemistry, Phenyl Ethers chemistry, Rhizophoraceae microbiology, Talaromyces chemistry
Abstract

Two new natural products, tenelate A (1) and B (2), together with the known compound, tenellic acid C (3), were isolated from the mangrove endophytic fungus Talaromyces sp. (SBE-14), from the South China Sea. Their structures were elucidated by spectroscopic methods, mainly 1D and 2D NMR techniques.

Published
2009
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4. 1H and 13C NMR assignments for 6-demethylvermistatin and two penicillide derivatives from the mangrove fungus Guignardia sp. (No. 4382) from the South China Sea.

Author

Xia XK, Liu F, She ZG, Yang LG, Li MF, Vrijmoed LL, and Lin YC

Subjects
Ascomycota growth & development, Carbon Isotopes, China, Heterocyclic Compounds, 3-Ring chemistry, Molecular Structure, Oceans and Seas, Plant Bark chemistry, Protons, Pyrones chemistry, Ascomycota chemistry, Heterocyclic Compounds, 3-Ring isolation & purification, Nuclear Magnetic Resonance, Biomolecular, Pyrones isolation & purification, Rhizophoraceae microbiology
Abstract

One new compound 6-demethylvermistatin (1), together with two known compounds, the penicillide derivatives (2) and (3) were isolated from the mangrove fungus Guignardia sp. No. 4382 obtained from the South China Sea. Their structures were assigned using high-resolution electron ionization mass spectrometry(HREIMS), (1)H and (13)C NMR spectra, DEPT, and by 2D COSY, HMQC, and HMBC experiments. The absolute configuration of 1 was established by comparison of its CD with that of vermistatin., (Copyright (c) 2008 John Wiley & Sons, Ltd.)

Published
2008
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5. Five nitro-phenyl compounds from the South China Sea mangrove fungus.

Author

Shao CL, Guo ZY, Xia XK, Liu Y, Huang ZJ, She ZG, Lin YC, and Zhou SN

Subjects
Glucosides chemistry, Magnetic Resonance Spectroscopy, Spectrophotometry, Ultraviolet, Fungi chemistry, Glucosides isolation & purification, Rhizophoraceae microbiology
Abstract

A novel nitro-phenyl glucoside (1) was isolated from mangrove endophytic fungus (fungus B60), collected from the Shenzhen mangrove Acanthus ilicifolius linn. Four related nitro-phenyl compounds (2-5) were also obtained, which were isolated for the first time as natural products. Their structures were established on the basis of NMR spectroscopic, mass spectrometric data and some chemical transformations. In the preliminary bioassay, compound 1 had a slight inhibitory effect on alpha-glucosidase with an IC(50) of 160.3 microM.

Published
2007
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