oxydi,ethanediyl,methyl,piperazinecarboxylate,1-piperazin,piperazine
1-Piperazin
63422-71-9(D-)-alpha-[[(4-Ethyl-2,3-dioxo-1-piperazinyl) carbonyl]amino]-2-(4-hydroxyphenyl) acetic acid
912451-14-01-Piperazinecarboxylic acid,4-[(4,5-dihydro-4-oxo-2-phenyl-2H-pyrazolo[3,4-c]quinolin-1-yl)acetyl]-,1,1-dimethylethyl ester
112984-60-86-Fluoro-1-methyl-4-oxo-7-(1-piperazinyl)-4H-[1,3]thiazeto[3,2-a]quinoline-3-carboxylic acid