Abstract
Chemical investigation of the stem bark of Combretum hartmannianum Schweinf (Combretaceae) led to the isolation and identification of nine compounds with pentacyclic triterpene skeletons. These were identified as three ursane-type triterpenes, ursolic acid (1), pomolic acid (2), and corosolic acid (3); one oleanane-type triterpene, arjunic acid (4); and five oleanane-type triterpene glucosides, arjunglucoside I (5), trachelosperoside E-1 (6), combreglucoside (7), chebuloside II (8), and 2α,3β,6β,19α-tetrahydroxyoleanolic acid 28-O-β-d-glucopyranoside (9). The chemical structures of these compounds were elucidated from spectroscopic data and by comparison of these data with previously published results. This is the first report of triterpene compounds from a species of C. hartmannianum and the first report of compounds 2 and 9 from a member of the Combretaceae family.
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