1,3-Dimethyl-6-(5-phenyl-[1,2,3]triazol-1-yl)-1H-pyrimidine-2,4-dione
1,3-dimethyl-2,4-dioxo-6-<(triphenylphosphoranylidene)amino>-1,2,3,4-tetrahydropyrimidine
1,3-dimethylpyrrolo<3,2-d>pyrimidine-2,4-dione
1,3,7,9-tetramethyl-1H,9H-pyrimido[5,4-g]pteridine-2,4,6,8-tetraone
1,3-dimethyl-6-oxo-7-(triphenylphosphoranylidene)-2,4-(1H,3H,5H)-6-pyrrolo[3,2-d]pyrimidinedione