Afzeliixanthones A and B, Two New Prenylated Xanthones from Garcinia afzelii E<small>NGL</small>. (Guttiferae)

Alain François Kamdem Waffo; Dulcie Mulholland; Jean Duplex Wansi; Luc Meva'a Mbaze; Robert Powo; Theophile Ngando Mpondo; Zacharias Tanee Fomum; Wilfried König; Augustin Ephrem. Nkengfack

doi:10.1248/cpb.54.448

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Afzeliixanthones A and B, Two New Prenylated Xanthones from Garcinia afzelii ENGL. (Guttiferae)

Alain François Kamdem Waffo, Dulcie Mulholland, Jean Duplex Wansi, Luc Meva'a Mbaze, Robert Powo, Theophile Ngando Mpondo, Zacharias Tanee Fomum, Wilfried König, Augustin Ephrem. Nkengfack

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Keywords: Garcinia afzelii, Guttiferae, xanthone

JOURNAL FREE ACCESS

2006 Volume 54 Issue 4 Pages 448-451

DOI https://doi.org/10.1248/cpb.54.448

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Abstract

Two new prenylated xanthones, afzeliixanthones A (1) and B (2), together with three known xanthones (3—5) and two phytosterols, β-sitosterol and stigmasterol, were isolated from the CH₂Cl₂/MeOH (1 : 1) extract of the stem bark of Garcinia afzelii ENGL. collected in the South West Province of Cameroon. Structures were mainly established using one and two-dimensional NMR and mass spectroscopies. The antioxidant activities of the crude extracts as well as the new compounds (1) and (2) were evaluated.

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