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

8-(4-Chloro-benzyl)-1,3-dimethyl-1H,8H-pyrido[2,3-d]pyrimidine-2,4,7-trione

8-(4-Methoxy-benzyl)-1,3-dimethyl-1H,8H-pyrido[2,3-d]pyrimidine-2,4,7-trione