methypiperazinyl,sildenafil,dimer,impurity,piperazinyl
Piperazinyl
652168-01-91H-Purine-2,6-dione,7-[[4-(1,1-dimethylethyl)phenyl]methyl]-3,7-dihydro-1,3-dimethyl-8-[4-(2-methylphenyl)-1-piperazinyl]-
63422-71-9(D-)-alpha-[[(4-Ethyl-2,3-dioxo-1-piperazinyl) carbonyl]amino]-2-(4-hydroxyphenyl) acetic acid
635719-17-4Benzamide,3-[[7-(2-butynyl)-6,7-dihydro-1-methyl-6-oxo-8-(1-piperazinyl)-1H-purin-2-yl]oxy]-, mono(trifluoroacetate)