InChI=1/C8H8N4O/c1-2-13-6-12-8-7(5-9)10-3-4-11-8/h3-4,6H,2H2,1H3/b12-6 ethyl (3-cyanopyrazin-2-yl)imidoformate methanimidic acid, (3-cyanopyrazinyl)-, ethyl ester