1,3,8-trimethylpyrido<2,3-d>pyrimidine-2,4,7-(1H,3H,8H)-trione

ethyl (E)-3-(6-amino-1,3-dimethyluracil-5-yl)acrylate

3-(6-{[1-(4-Chloro-phenyl)-meth-(E)-ylidene]-amino}-1,3-dimethyl-2,4-dioxo-1,2,3,4-tetrahydro-pyrimidin-5-yl)-propionic acid ethyl ester

3-{1,3-Dimethyl-2,4-dioxo-6-[1-phenyl-eth-(E)-ylideneamino]-1,2,3,4-tetrahydro-pyrimidin-5-yl}-propionic acid ethyl ester

8-Benzyl-1,3-dimethyl-1H,8H-pyrido[2,3-d]pyrimidine-2,4,7-trione