Iridoid glycosides from Gmelina arborea

Three iridoid glycosides 6-O-(3″-O-benzoyl)-α-l-rhamnopyranosyl catalpol (1a), 6-O-(3″-O-trans-cinnamoyl)-α-l-rhamnopyranosylcatalpol (2a) and 6-O-(3″-O-cis-cinnamoyl)-α-l-rhamnopyranosylcatalpol (3a) were isolated from aerial parts of Gmelina arborea.