Pestalotiopisorin B,a new isocoumarin derivative from the mangrove endophytic fungus Pestalotiopsis sp. HHL101 |
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| Authors: | Zhiyong Xu Xi Wu Gang Li Zhao Feng |
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| Institution: | 1. Key Laboratory of Tropical Biological Resources of Ministry of Education, College of Material and Chemical Engineering, Hainan University, Haikou, P. R. China;2. Institute of Tropical Agriculture and Forestry, Hainan University, Haikou, P. R. China |
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| Abstract: | AbstractA 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?μg/ml, 50?μg/ml, respectively. Compound 4 showed moderate calcineurin inhibitory activity towards p-nitrophenyl phosphate (IC50 =134.29?±?5.377?μM). |
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| Keywords: | Rhizophora stylosa endophytic fungi Pestalotiopsis sp antibacterial activity calcineurin inhibitory activity |
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