(p-((2,4,6-Triamino-5-pyrimidinyl)azo)phenyl)phosphonic acid 3822-79-5 5-25-18-00290 (Beilstein Handbook Reference) BRN 0329539 NSC 520867 PY-80 Phosphonic acid, (p-((2,4,6-triamino-5-pyrimidinyl)azo)phenyl)-