3413-58-9 522-60-1 Cinchonan-9-ol, 6'-ethoxy-10,11-dihydro-, monohydrochloride, (8alpha,9R)- (9CI) EINECS 222-302-3 ETHYLHYDROCUPREINE HYDROCHLORIDE Hydrocupreine, O-6'-ethyl-, monohydrochloride (VAN) Hydrocupreine, O-ethyl-, hydrochloride Hydrocupreine, ethyl ester, hydrochloride NSC 5361 Neumolisina Numoquin hydrochloride Optochin hydrochloride Optoquin hydrochloride Optoquinhydrochloride Rhombic