Pycnidiophorones A-D, four new cytochalasans from the wetland derived fungus Pycnidiophora dispersa.

ABSTRACT: Pycnidiophorones A-D (1-4), four new cytochalasans with a rare 5/6/6/5/6 pentacyclic skeleton incorporating the unique 12-oxatricyclo[6.3.1.0^2,7]dodecane core, and six known depsidones (5-10) were isolated from cultures of the wetland-soil-derived fungus Pycnidiophora dispersa. Their chemical structures were unambiguously determined using NMR spectroscopic data. The absolute configurations of 1 and 3 were assigned by electronic circular dichroism (ECD) calculations. Compounds 1-10 showed moderate cytotoxicity against a panel of five human tumor cell lines.

SUBMITTER: Zhao C 

PROVIDER: S-EPMC9057502 | biostudies-literature | 2020 Nov

REPOSITORIES: biostudies-literature