Abstract
A new quaiane-tgpe sesquiterpene was isolated from the 95% ethanol extract of the rhizomes of Acorus calamus by silica gel and sephadex LH-20 column chromatographic methods. Structure and absolute configuration of the sesquiterpene were elucidated by spectroscopic data and X-ray crystallographic analysis, and named as 1R,5R,7S-guaiane-4R,10R-diol-6-one.
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