N-(5-chloro-2-methylphenyl)-2-(cyclopropylmethoxy)isonicotinamide

5-(2-indolin-1-yl-2-oxo-ethyl)sulfanyl-1,3-dimethyl-7-(2-thienyl)pyrimido[4,5-d]pyrimidine-2,4-dione

2-[1,3-dimethyl-2,4-dioxo-7-(2-thienyl)pyrimido[4,5-d]pyrimidin-5-yl]sulfanyl-N-(4-methoxyphenyl)acetamide

2-[1,3-dimethyl-2,4-dioxo-7-(2-thienyl)pyrimido[4,5-d]pyrimidin-5-yl]sulfanyl-N-(2-ethoxyphenyl)acetamide

ethyl 4-[[2-[1,3-dimethyl-2,4-dioxo-7-(2-thienyl)pyrimido[4,5-d]pyrimidin-5-yl]sulfanylacetyl]amino]benzoate

2-[1,3-dimethyl-2,4-dioxo-7-(2-thienyl)pyrimido[4,5-d]pyrimidin-5-yl]sulfanyl-N-(5-ethylsulfanyl-1,3,4-thiadiazol-2-yl)acetamide

5-[2-(4-methoxyphenyl)-2-oxo-ethyl]sulfanyl-1,3-dimethyl-7-(2-thienyl)pyrimido[4,5-d]pyrimidine-2,4-dione

6-[2-(4-benzyl-1-piperidyl)-2-oxo-ethyl]-3-(p-tolylmethyl)triazolo[4,5-d]pyrimidin-7-one

N-(3-nitrophenyl)-2-[7-oxo-3-(p-tolylmethyl)triazolo[4,5-d]pyrimidin-6-yl]acetamide

ethyl 4-[[2-[7-oxo-3-(p-tolylmethyl)triazolo[4,5-d]pyrimidin-6-yl]acetyl]amino]benzoate

methyl 2-(7-oxo-3-phenyl-triazolo[4,5-d]pyrimidin-6-yl)butanoate