108-53-2 2-Amino-4-hydroxypyrimidine 2-Amino-4-oxypyrimidine 2-Amino-4-pyrimdinol 2-Amino-4-pyrimidone 4(1H)-Pyrimidinone, 2-amino- 4(3H)-Pyrimidinone, 2-amino- 4-Pyrimidinol, 2-amino- Isocytosine NSC49118