1-(4-Chlorobenzhydryl)piperazine dihydrochloride 1-(p-Chloro-alpha-phenylbenzyl)piperazine dihydrochloride 1031-92-1 N-(4-Chlorobenzhydryl)piperazine dihydrochloride N-(p-Chlorobenzhydryl)piperazine dihydrochloride Norchlorcyclizine dihydrochloride Piperazine, 1-((4-chlorophenyl)phenylmethyl)-, dihydrochloride Piperazine, 1-(p-chloro-alpha-phenylbenzyl)-, dihydrochloride