Cetirizine Ethyl Ester

2-[2-[4-[(4-Chlorophenyl)phenylmethyl]-1-piperazinyl]ethoxy]acetic Acid Ethyl Ester; [2-[4-[(4-chlorophenyl)phenylmethyl]-1-piperazinyl]ethoxy]acetic Acid Ethyl Ester; (RS)-2-[2-[4-[(4-Chlorophenyl)phenylmethyl]piperazin-1-yl]ethoxy]acetic acid, ethyl ester (Cetirizine Ethyl Ester);  Cetirizine Related Compound A (USP - Oxalate Salt)