6-(2-Methylphenyl)-1,3,7-trimethylpyrimido(4,5-d)pyrimidine-2,4,5(1H,3H,6H)-trione 64467-34-1 BRN 1170363 Pyrimido(4,5-d)pyrimidine-2,4,5(1H,3H,6H)-trione, 6-(2-methylphenyl)-1,3,7-trimethyl-