In addition to two known flavonoids, kumatakenin and isokaempferide, t
hree new cycloartane triterpenes were isolated from the leaves of Comb
retum quadrangulare. Their structures were established by the means of
1D and 2D NMR techniques and physical data (MS, IR) as 1 alpha,3 beta
-dihydroxy-cycloart-24-ene-30-carboxylic acid, 1 alpha,3 beta-dihydrox
y-cycloart-24-ene-30-carboxylic acid methyl ester and (20 xi)-1 alpha,
3 ,25-trihydroxy-cycloart-21-al-23-ene-30-carboxylic acid methyl ester
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