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Eight pentacyclic triterpenoids were isolated from the methanol extract of the roots of Rhodomyrtus tomentosa. By application of spectroscopic methods (especially 1D-, 2D-NMR, MS), the structures were established as 23-cis-p-coumaroyloxy-2α,3β-dihydroxyolean-12-en-28-oic acid (1), 23-trans-p-coumaroyloxy-2α,3β-dihydroxyolean-12-en-28-oic acid (2), 3β-O-trans-ferulyl-2α,23-dihydroxyolean-12-en-28-oic acid (3), 3β-O-trans-p-coumaroyl-2α,23-dihydroxyolean-12-en-28-oic acid (4),doi:10.6023/cjoc201303029 fatcat:rg7jnxaw5nazbey7jkvw4zrjoy