Similar names: Indolo[2,3-a]quinolizine-2-acetic acid, 3-ethyl-1,2,3,4,6,7,12,12b-octahydro-8-methoxy-α-(methoxymethylene)-, methyl ester, (αE,2S,3S,12bS)-; Corynan-16-carboxylic acid, 16,17-didehydro-9,17-dimethoxy-, methyl ester, (16E,20β)-; Corynantheidine, 9-methoxy- (7CI); Mitragynine (6CI); (-)-Mitragynine; 9-Methoxycorynantheidine; Indolo[2,3-a]quinolizine-2-acetic acid, 3-ethyl-1,2,3,4,6,7,12,12b-octahydro-8-methoxy-α-(methoxymethylene)-, methyl ester, [2S-[2α(E),3α,12bβ]]-; Mitragynin; Kratom