1-(Diphenylmethyl)-4-(3-phenyl-2-propenyl)piperazine dihydrochloride 298-57-7 7002-58-6 Cinnarizine dihydrochloride Piperazine, 1-(diphenylmethyl)-4-(3-phenyl-2-propenyl)-, dihydrochloride Piperazine, 1-cinnamyl-4-(diphenylmethyl)-, dihydrochloride