ABIETANE DITERPENOIDS FROM PLECTRANTHUS GRANDIDENTATUS
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PERGAMON-ELSEVIER SCIENCE LTD
Abstract
The acetone extract of the whole plant of Plectranthus grandidentatus provided the already known
abietanes royleanone, 6,7-dehydroroyleanone, horminone, 6β-hydroxyroyleanone, 7α-acetoxy-6β-hydroxyroyleanone and the abietane dimers grandidone C, grandidone D and 7-epigrandidone D, together with a mixture of
fatty acid esters of 7α-acyloxy-6β,12-dihydroxy-abieta-8,12-diene-11,14-dione. Some of these compounds showed
moderate antibacterial activity.