(-)-dehydromitragynine
(E)-methyl 3-methoxy-2-((2S,3R,12bS)-8-methoxy-3-vinyl-1,2,3,4,6,7,12,12b-octahydroindolo[2,3-a]quinolizin-2-yl)acrylate
mitragynine
methyl (E)-2-((2S,3R,12bS)-3-ethyl-8-methoxy-1,2,3,4,6,7,12,12b-octahydroindolo[2,3-a]quinolizin-2-yl)-3-methoxyacrylate