Virgatolides A-C, benzannulated spiroketals from the plant endophytic fungus Pestalotiopsis virgatula |
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| Authors: | Li Jian Li Li Si Yikang Jiang Xuejun Guo Liangdong Che Yongsheng |
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| Affiliation: | Key Laboratory of Systematic Mycology & Lichenology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, People's Republic of China. |
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| Abstract: | Virgatolides A-C (1-3), unique metabolites with a 3',4',5',6'-tetrahydrospiro[chroman-2,2'-pyran] core, were isolated from cultures of the plant endophytic fungus Pestalotiopsis virgatula. Compounds 1-3 possess two previously undescribed skeletons originating from a benzannulated 6,6-spiroketal and one (2 and 3) and two (1) γ-lactone units, respectively. The structure of 1 was secured by X-ray crystallography. |
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