Pentacyclic Triterpenoids from the Roots ofRhodomyrtus tomentosa

Juan Xiong, Ya Huang, Yu Tang, Mei You, Jinfeng Hu
2013 Youji huaxue  
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),
more » ... 3β-O-cis-p-coumaroyl-2α,23-dihydroxyolean-12-en-28-oic acid (5), maslinic acid (6), arjunolic acid (7) , and 2α,3β-dihydroxytaraxer-20-en-28-oic acid (8). Among them, compounds 1 and 3 were new oleanane-type triterpenoids, while compounds 2, 4~6 and 8 were isolated from this plant for the first time. This is the first report on the chemical constituents from the roots of R. tomentosa.
doi:10.6023/cjoc201303029 fatcat:rg7jnxaw5nazbey7jkvw4zrjoy