1,3-Dimethyl-5-(methylamino)pyrido(4,3-d)pyrimidine-2,4(1H,3H)-dione 112500-68-2 5-Methylamino-1,3-dimethylpyrido(4,3-d)pyrimidine-2,4-dione Pyrido(4,3-d)pyrimidine-2,4(1H,3H)-dione, 1,3-dimethyl-5-(methylamino)-