1 SC3 7-benzyl-1,3-dimethyl-8-piperazin-1-yl-3,7-dihydro-purine-2,6-dione 1.000 2 RUF 7-(2-chlorobenzyl)-1,3-dimethyl-8-piperazin-1-yl-3,7-dihydro-1h-purine-2,6-dione 0.963 3 6Z8 8-[(3~{R})-3-azanylpiperidin-1-yl]-7-[(2-bromophenyl)methyl]-1,3-dimethyl-purine-2,6-dione 0.862 4 XIH 2-({8-[(3r)-3-aminopiperidin-1-yl]-1,3-dimethyl-2,6-dioxo-1,2,3,6-tetrahydro-7h-purin-7-yl}methyl)benzonitrile 0.833 5 LIR 2-[(3s)-3-aminopiperidin-1-yl]-1-(2-cyanobenzyl)-5-methyl-4,6-dioxo-3,4,5,6-tetrahydropyrrolo[3,4-D]imidazol-1-ium 0.710