2,2-Diphenyl-2-ethoxyacetic acid (1-methyl-2-pyrrolidinyl)methyl ester hydrobromide 5505-69-1 ACETIC ACID, 2,2-DIPHENYL-2-ETHOXY-, (1-METHYL-2-PYRROLIDINYL)METHYL ESTER, HYDR Acetic acid, 2,2-diphenyl-2-ethoxy-, (1-methyl-2-pyrrolidinyl)methyl ester, hydrobromide