methyl,piperazinyl,rifamycin,1-piperazin,1-piperazinyl
1-Piperazin
861720-29-82H-Imidazol-2-one,1-(4-butoxyphenyl)-1,3-dihydro-3-[4-(4-methyl-1-piperazinyl)cyclohexyl]-
63422-71-9(D-)-alpha-[[(4-Ethyl-2,3-dioxo-1-piperazinyl) carbonyl]amino]-2-(4-hydroxyphenyl) acetic acid