1,3,5-Triazin-2(1H)-one, 4-amino- 4-Amino-1,3,5-triazin-2(1H)-one 4-Amino-1,3,5-triazin-2-one 4040-10-2 5-Azacytosine 931-86-2 EINECS 213-242-9 NSC 51100 NSC 54006 s-Triazin-2(1H)-one, 4-amino- s-Triazin-2-ol, 4-amino-