Two new skeletal diterpenes, named galanal A and B, and two new labdane-type diterpenes, named galanolactone and ( E )-8 (17),12-labddiene-15,16-dial, were isolated from Alpinia galanga (Zingiberaceae) together with ( E )-8β(17)-epoxylabd-12-ene-15,16-dial. Their structures were established on the basis of spectral and chemical evidence. The cytotoxic and antifungal activities of these compounds are discussed.
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Morita et al. (1988) studied this question.
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