Synonyms: (16E,20b)-16,17-Didehydro-9,17-dimethoxycorynan-16-carboxylic Acid Methyl Ester;4098-40-2;Corynan-16-carboxylic acid, 16,17-didehydro-9,17-dimethoxy-, methyl ester, (16E,20.beta.)-;indolo[2,3-a]quinolizine-2-acetic acid, 3-ethyl-1,2,3,4,6,7,12,12b-octahydro-8-methoxy-alpha-(methoxymethylene)-, methyl ester, (alphaE,2S,3S,12bS)-;Methyl (16E,20beta)-9,17-dimethoxycoryn-16-en-16-carboxylate;Methyl (16E,20beta)-9-methoxy-16-(methoxymethylene)corynan-17-oate