2-Amino-4,6-dihydroxypyrimidine 2-Amino-4,6-dioxypyrimidine 2-Amino-4,6-pyrimidinedione 4(1H)-Pyrimidinone, 2-amino-6-hydroxy- 4,6-Dihydroxy-2-aminopyrimidine 56-09-7 NSC18692