1-(p-Chloro-alpha-phenylbenzyl)-4-methylpiperazine hydrochloride 1620-21-9 CHLORCYCLIZINE HYDROCHLORIDE Mantadil Piperazine, 1-((4-chlorophenyl)phenylmethyl)-4-methyl-, hydrochloride Piperazine, 1-(p-chloro-alpha-phenylbenzyl)-4-methyl-, hydrochloride