Abstract
A new benzodiazepine alkaloid, circumdatin M (1), with a rare pyrimidone-4-pyrone moiety was isolated from a Hawaiian marine fungus Aspergillus sp. FM242. The structure of compound 1 was determined by analysis of HRMS and NMR spectroscopic data, and DP4+ NMR calculations. The absolute configurations of compound 1 were assigned by CD calculations. Compound 1 was tested inactive against A2780 and A2780CisR.
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