A new spirocyclic compound from the liquid culture of entomogenous fungus Isaria cateniannulata
2012
A new spirocyclic compound named (2S, 5S, 7S)-3α-hydroxyl-exogonic acid (1) was isolated from the liquid culture of entomogenous fungus Isaria cateniannulata. The structure and relative stereochemistry of 1 were elucidated by extensive spectroscopic analysis and by comparison of its NMR data with those of known compound. Compound 1 showed weak inhibitory activity against HeLa with IC50 value of 80.5 μg ml− 1.
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