piperazinecarboxaldehyde,hydroxy,1-piperazin,piperazine
1-Piperazin
24637-26-1N-[(5-Nitrofuran-2-yl)methylene]-4-(3,7-dimethyl-6-octenyl)-1-piperazineacetic acid hydrazide
63422-71-9(D-)-alpha-[[(4-Ethyl-2,3-dioxo-1-piperazinyl) carbonyl]amino]-2-(4-hydroxyphenyl) acetic acid