英文别名2-[2-[4-[(R)-(4-chlorophenyl)-phenylmethyl]-1-oxidopiperazin-1-ium-1-yl]ethoxy]acetic acid; (R)-[2-[4-(4-Chlorophenyl)phenylmethyl]-1-oxido-1-piperazinyl]ethoxy]acetic Acid; (R)-Cetirizine N-Oxide; (2-{4-[(4-Chlorophenyl)(phenyl)methyl]-1-oxido-1-piperazinyl}ethoxy)acetic acid; Levocetetrizine N-Oxide; (R)-Cetirizine N-Oxide DiHCl; Levocetirizine N-Oxide Impurity; etirizine N-Oxide (R)-Isomer; Acetic acid, 2-[2-[4-[(R)-(4-chlorophenyl)phenylmethyl]-1-oxido-1-piperazinyl]ethoxy]- 
