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Four new labdane-type diterpenes, coronarin, A, B, C, and D, and one known labdane-type diterpene, ( E )-labda-8(17), 12- diene-15, 16-dial were isolated as cytotoxic prinicples from the rhizomes of Hedychium coronarium , Zingiberaceae. The structures were established by chemical and spectroscopic methods.
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Itokawa et al. (1988) studied this question.
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