4,6-Diamino-2-hydroxy-5-pyrimidine sulfonic acid 5-Pyrimidinesulfonic acid, 4,6-diamino-1,2-dihydro-2-oxo- 5-Pyrimidinesulfonic acid, 4,6-diamino-2-hydroxy- 74039-24-0 NSC65400 WLN: T6N CNJ BQ DZ ESWQ FZ