Investigations of the stem and root bark of Turraea holstii (Meliaceae) hav
e yielded three novel triterpenoids, holstinone A (21R,23R-epoxy-7 alpha,24
S-dihydroxy-21 alpha,25-dimethoxyapotirucalla-1,14-dien-3-one), holstinone
B (21S,23R-epoxy-7 alpha,24S,25-trihydroxy- 21 beta-methoxyapotirucalla-1,1
4-dien-3-one) and holstinone C (21R,23R-epoxy-7 alpha,24S,25-trihydroxy-21
alpha- methoxyapotirucalla-1,14-dien-3-one). (C) 1999 Elsevier Science Ltd.
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