methyl,piperazinyl,ethyl,naphthyl,quinazoline,1-piperazin,1-piperazinyl
1-Piperazinyl
63422-71-9(D-)-alpha-[[(4-Ethyl-2,3-dioxo-1-piperazinyl) carbonyl]amino]-2-(4-hydroxyphenyl) acetic acid
19971-76-77-[3-(4-Butyl-1-piperazinyl)-2-hydroxypropyl]-3,7-dihydro-1,3-dimethyl-1H-purine-2,6-dione