Abstract
Two novel polyketides, penicillones A (1) and B (2), with tricyclo [5.3.1.03,8] undecane skeleton, were isolated from Penicillium terrestre. Their structures and relative stereochemistries were determined on the basis of spectroscopic methods. The absolute configuration of 2 was established by the modified Mosher’s method, while that of 1 was deduced from the similar CD absorptions of 1 and 2. Compound 1 showed weak cytotoxicities against P338 and A-549 cell lines, while 2 was inactive against P388.
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