(16E,20-beta)-16,17-Didehydro-17-methoxycorynan-16-carboxylic acid methyl ester hydrochloride 7149-56-6 Corynan-16-carboxylic acid, 16,17-didehydro-17-methoxy-, methyl ester, monohydrochloride, (16E,20-beta)- Corynantheidine chlorhydrate [French] Corynantheidine hydrochloride NSC 72135