3-{1H,4H,6H,7H-pyrano[4,3-c]pyrazol-3-yl}pyrrolidine

3-cinnamyl-9-(3-methoxyphenyl)-1,7-dimethyl-6,7,8,9-tetrahydropyrimido[2,1-f]purine-2,4(1H,3H)-dione

9-(3-chlorophenyl)-1,7-dimethyl-3-(2-methylbenzyl)-6,7,8,9-tetrahydropyrimido[2,1-f]purine-2,4(1H,3H)-dione

9-(5-chloro-2-methylphenyl)-1,7-dimethyl-3-(3-methylbenzyl)-6,7,8,9-tetrahydropyrimido[2,1-f]purine-2,4(1H,3H)-dione

3-Methyl-4-[(2-thienylsulfonyl)amino]benzoic acid

9-(3-chlorophenyl)-1,7-dimethyl-3-phenethyl-6,7,8,9-tetrahydropyrimido[2,1-f]purine-2,4(1H,3H)-dione

9-(4-bromophenyl)-1,7-dimethyl-3-phenethyl-6,7,8,9-tetrahydropyrimido[2,1-f]purine-2,4(1H,3H)-dione

ethyl 2-(1,7-dimethyl-2,4-dioxo-9-(4-phenoxyphenyl)-1,2,6,7,8,9-hexahydropyrimido[2,1-f]purin-3(4H)-yl)acetate

3-benzyl-1,7-dimethyl-9-(o-tolyl)-6,7,8,9-tetrahydropyrimido[2,1-f]purine-2,4(1H,3H)-dione

1,3-dimethyl-8-((2-methylpiperidin-1-yl)methyl)-7-nonyl-1H-purine-2,6(3H,7H)-dione

9-(4-bromophenyl)-3-(4-fluorobenzyl)-1-methyl-6,7,8,9-tetrahydropyrimido[2,1-f]purine-2,4(1H,3H)-dione