6-(2-Fluorophenyl)-1,3,7-trimethylpyrimido(4,5-d)pyrimidine-2,4,5(1H,3H,6H)-trione 64467-26-1 BRN 1174239 Pyrimido(4,5-d)pyrimidine-2,4,5(1H,3H,6H)-trione, 6-(2-fluorophenyl)-1,3,7-trimethyl-