The syntheses of (-)-7betaH-eudesmane-4alpha,11-diol (2) and (+)-ent-7betaH-eudesmane-4alpha,11-diol (ent-2) were carried out starting from (-)- and (+)-dihydrocarvones. As a result, the structure, including absolute configuration, of the naturally occurring eudesmane-4,11-diol isolated from Pluchea arguta was determined to be (+)-ent-7betaH-eudesmane-4alpha,11-diol (ent-2).
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Shimoma et al. (1998) studied this question.
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