A new xanthone derivative from the co-culture broth of two marine fungi (strain no. E33 and K38)

摘要

A new xanthone derivative, 8-hydroxy-3-methyl-9-oxo-9H-xanthene-1- carboxylic acid methyl ether (1), was isolated from the co-culture broth of two mangrove fungi (strain No. K38 and E33) isolated from the South China Sea coast. The structure of 1 was determined by comprehensive spectroscopic methods, especially 2D NMR techniques. Primary bioassays showed that compound 1 has inhibitory activity against five microorganisms, including Gloeasporium musae and Peronophthora cichoralearum etc.