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Paper | Regular issue | Vol 81, No. 5, 2010, pp.1231-1237
Published online, 1st March, 2010
DOI: 10.3987/COM-10-11919
Palmariols A and B, Two New Chlorinated Dibenzo-α-pyrones from Discomycete Lachnum palmae

Takunori Matsumoto, Tsuyoshi Hosoya, and Hideyuki Shigemori*

*Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Ibaraki 305, Japan

Abstract

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.