Abstract
A new chlorinated 11-noreremophilane-type sesquiterpene (1) together with 3-epiisopetasol, PR-amide and mycophenolic acid (2–4) were isolated from endophytic fungus Penicillium citreonigrum. The structures of 1–4 were elucidated by a combination of spectroscopic data and single-crystal X-ray diffraction analysis. Among them, compounds 1 and 4 showed moderate antioxidant capacities compared with ascorbic acid at 0.2 mM concentration.
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