Synonyms: Methyl (19alpha,20alpha)-16,17-didehydro-10,11-dimethoxy-19-methyloxayohimban-16-carboxylate;Isoreserpilin;Oxayohimban-16-carboxylic acid, 16,17-didehydro-10,11-dimethoxy-19-methyl-, methyl ester, (19alpha,20alpha)-;methyl (19alpha,20alpha)-10,11-dimethoxy-19-methyl-16,17-didehydro-18-oxayohimban-16-carboxylate