1-(4,4-Diphenyl-3-butenyl)-4-phenylisonipecotic acid ethyl ester hydrochloride 14106-90-2 4-Piperidinecarboxylic acid, 1-(4,4-diphenyl-3-butenyl)-4-phenyl-, ethyl ester hydrochloride ISONIPECOTIC ACID, 1-(4,4-DIPHENYL-3-BUTENYL)-4-PHENYL-, ETHYL ESTER, HYDROCHLOR Isonipecotic acid, 1-(4,4-diphenyl-3-butenyl)-4-phenyl-, ethyl ester, hydrochloride