1-Piperazinepropanoic acid, 4-(2-((4-nitrophenyl)phenylmethoxy)ethyl)-, ethyl ester, 2HCl 1-Piperazinepropionic acid, 4-(2-((p-nitrophenyl)phenylmethoxy)ethyl)-, ethyl ester, dihydrochloride 4-(2-(p-Nitrophenyl-phenylmethoxy)ethyl)-1-piperazinepropionic acid ethyl ester 2HCl 61897-30-1