Norchlorcyclizine ; 1-(p-Chloro-alpha-phenylbenzyl)piperazine ; 4-(4-Chlorobenzhydryl)piperazine ; N-(4-Chlorobenzhydryl)piperazine ; 1-[(4-Chlorophenyl)phenylmethyl]piperazine ; NSC 86164 ; Hydroxyzine EP Impurity A ; Cetirizine EP Impurity A ; Hydroxyzine USP Related Compound A ; Levocetirizine EP Impurity A