1-Piperazineacetic acid,4-[(2R,3R)-2,3-dihydroxy-1,4-dioxo-4-[[2-(2-thienyl)ethyl]amino]butyl]-,ethyl ester
1-piperazineacetic acid, 4-[2-(diphenylmethoxy)ethyl]-, sodium salt (1:1)
1-Piperazineacetic acid, 4-phenyl-,2-[[(4-chlorophenyl)amino]thioxomethyl]hydrazide
1-Piperazineacetic acid, a-[(2-chlorophenyl)methyl]-4-(2-hydroxybutyl)-,methyl ester, dihydrochloride