2,4-Diamino-6-hydroxy-5-phenylazopyrimidine 2,6-Diamino-5-(phenylazo)-4-pyrimidinol 3054-70-4 4(1H)-Pyrimidinone, 2,6-diamino-5-(phenylazo)- 4-Pyrimidinol, 2,6-diamino-5-(phenylazo)- AI3-61840 NSC 5200