1,2,4-Triazin-3(2H)-one, 5-amino-2-(tetrahydro-2-furanyl)- 159494-27-6 5-Amino-2-(tetrahydro-2-furanyl)-1,2,4-triazin-3(2H)-one N(sup 1)-(Tetrahydrofuranyl)-6-azacytosine