4-(2,4-Diamino-6-hydroxy-5-pyrimidinylazo)benzenesulfonamide Benzenesulfonamide, p-(2,4-diamino-6-hydroxy-5-pyrimidinylazo)- DB1598000 Py-73 p-(2,4-Diamino-6-hydroxy-5-pyrimidinylazo)benzenesulfonamide