Abstract
In addition to two known flavonoids, kumatakenin and isokaempferide, three new cycloartane triterpenes were isolated from the leaves of Combretum quadrangulare. Their structures were established by the means of 1D and 2D NMR techniques and physical data (MS, IR) as 1α,3β-dihydroxy-cycloart-24-ene-30-carboxylic acid, 1α,3β-dihydroxy-cycloart-24-ene-30-carboxylic acid methyl ester and (20ξ)-1α,3β,25-trihydroxy-cycloart-21-al-23-ene-30-carboxylic acid methyl ester.
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