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Meng-Ting LIU, Yan HE, Ling SHEN, Zheng-Xi HU, Yong-Hui ZHANG. Bipolarins A-H, eight new ophiobolin-type sesterterpenes with antimicrobial activity from fungus Bipolaris sp. TJ403-B1[J]. Chinese Journal of Natural Medicines, 2019, 17(12): 935-944.

Citation:

Meng-Ting LIU, Yan HE, Ling SHEN, Zheng-Xi HU, Yong-Hui ZHANG. Bipolarins A-H, eight new ophiobolin-type sesterterpenes with antimicrobial activity from fungus Bipolaris sp. TJ403-B1[J]. Chinese Journal of Natural Medicines, 2019, 17(12): 935-944.

Bipolarins A-H, eight new ophiobolin-type sesterterpenes with antimicrobial activity from fungus Bipolaris sp. TJ403-B1

摘要

Abstract: Bipolarins A-H ( 1-8 ), eight new tetracyclic ophiobolin-type sesterterpenes featuring a rare oxaspiro4.4nonane moiety, were isolated from cultures of fungus Bipolaris sp. TJ403-B1. Their structures and absolute configurations were elucidated by comprehensive spectroscopic analyses, single-crystal X-ray diffraction experiments, electronic circular dichroism and ¹³C NMR calculations. Additionally, compound 5 exhibited significant selective antimicrobial activity against Enterococcus faecalis with an MIC value 8 μg·mL^-1.

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