1-(4,4-Diphenyl-3-oxobutyl)-4-carbethoxy-4-phenylpiperidine hydrobromide 14120-85-5 4-Piperidinecarboxylic acid, 1-(4,4-diphenyl-3-oxobutyl)-4-phenyl-, ethyl ester, HBr ISONIPECOTIC ACID, 1-(4,4-DIPHENYL-3-OXOBUTYL)-4-PHENYL-, ETHYL ESTER, HYDROBROM Isonipecotic acid, 1-(4,4-diphenyl-3-oxobutyl)-4-phenyl-, ethyl ester, hydrobromide