57005-60-4
6-OXO-1,6-DIHYDROPYRAZINE-2,3-DICARBONITRILE
→
73403-50-6
4H-furo[3,4-b]pyrazine-3,5,7-trione
73403-52-8
6-氧代-1,6-二氢吡嗪-2,3-二甲酰胺