A new naphthalenone derivative ( 2a ) and a phthalide ( 6a ), as well as a methyl ester ( 6b ), were isolated from submerged cultures of Lachnum papyraceum, together with known naphthalenone, phthalide, and chromanol derivatives. The structures of the new compounds, of which 2a possesses weak antimicrobial and phytotoxic activities and weak cytotoxicity, were determined by spectroscopic methods.
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Shan et al. (1997) studied this question.
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