3-(2-Oxo-1,2-dihydropyrimidin-1-yl)propanoic acid hydrochloride

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

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

ethyl 4-[2-(1,3-dimethyl-2,4-dioxo-7-phenyl-pyrimido[4,5-d]pyrimidin-5-yl)sulfanylacetyl]piperazine-1-carboxylate

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

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

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

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

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

ethyl 4-[2-[7-(4-methoxyphenyl)-1,3-dimethyl-2,4-dioxo-pyrimido[4,5-d]pyrimidin-5-yl]sulfanylacetyl]piperazine-1-carboxylate

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