Two new chlorinated dibenzo-α-pyrones, palmariols A (1) and B (2), together with alternariol 9-methyl ether (3), were isolated from the mycelial extract of discomycete Lachnum palmae (NRBC-106495), and the structures of 1 and 2 were elucidated using spectroscopic data.Palmariols A (1) and B (2) are rare dizenzo-α-pyrones containing a chlorine.Compounds 1~3 exhibited weak antimicrobial activity against Mucor racemosus and Bacillus subtilis.
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Shigemori et al. (2010) studied this question.
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