2,2-Diphenyl-2-ethoxyacetic acid (1-ethyl-4-piperidyl)methyl ester hydrochloride 2893-42-7 ACETIC ACID, 2,2-DIPHENYL-2-ETHOXY-, (1-ETHYL-4-PIPERIDYL)METHYL ESTER, HYDROCHL Acetic acid, 2,2-diphenyl-2-ethoxy-, (1-ethyl-4-piperidyl)methyl ester, hydrochloride