65-19-0 NSC19509 YOHIMBINE Yohimban-16-carboxylic acid, 17-hydroxy-, methyl ester, monohydrochloride, (16.alpha.,17.alpha.)- Yohimban-16.alpha.-carboxylic acid, 17.alpha.-hydroxy-, methyl ester, monohydrochloride Yohimbine hydrochloride Yohimbine monohydrochloride Yohimbine, hydrochloride