Synonyms: 17,18-Secoyohimban-16-carboxylicacid, 16,17,18,19-tetradehydro-9,17-dimethoxy-, methyl ester, (E)- (8CI);Corynan-16-carboxylic acid, 16,17,18,19-tetradehydro-9,17-dimethoxy-, methylester, (16E)-; Paynantheine (7CI); Indolo[2,3-a]quinolizine,corynan-16-carboxylic acid deriv.