carbamic,piperazinyl,ethyl,nitrophenyl,methylester,1-piperazin,1-piperazinyl
1-Piperazin
63422-71-9(D-)-alpha-[[(4-Ethyl-2,3-dioxo-1-piperazinyl) carbonyl]amino]-2-(4-hydroxyphenyl) acetic acid
502658-24-41-Piperazinecarboxylic acid,4-[2-[[5-(1H-pyrazol-3-yl)-2-pyridinyl]oxy]ethyl]-, ethyl ester,trihydrochloride
112984-60-86-Fluoro-1-methyl-4-oxo-7-(1-piperazinyl)-4H-[1,3]thiazeto[3,2-a]quinoline-3-carboxylic acid