期刊
NATURAL PRODUCT RESEARCH
卷 34, 期 7, 页码 1002-1007出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/14786419.2018.1539980
关键词
Rhizophora stylosa; endophytic fungi; Pestalotiopsis sp; antibacterial activity; calcineurin inhibitory activity
A new isocoumarin derivative pestalotiopisorin B (1), along with six known compounds, (R)-(-)- mellein methyl ether (2), pestalotiopyrone G (3), (R)-mevalonolactone (4), pestalotiollides A-B (5-6) and pestalotiopsol A(7) were isolated from Pestalotiopsis sp., an endophytic fungus obtained from Chinese mangrove plant Rhizophora stylosa. Their structures were elucidated unambiguously by the comprehensive analysis of extensive spectroscopic data. Compound 1 exhibited modest antibacterial activity against Escherichia coli and Pseudomonas aeruginosa with 12.5 mu g/ml, 50 mu g/ml, respectively. Compound 4 showed moderate calcineurin inhibitory activity towards p-nitrophenyl phosphate (IC50 =134.29 +/- 5.377 mu M).
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