73403-51-7
methyl 3-carboxy-1,6-dihydro-6-oxo-2-pyrazinecarboxylate
→
~56%
13924-98-6
6-羟基吡嗪-2-羧酸甲酯
73403-52-8
6-氧代-1,6-二氢吡嗪-2,3-二甲酰胺
73403-50-6
4H-furo[3,4-b]pyrazine-3,5,7-trione
57005-60-4
6-OXO-1,6-DIHYDROPYRAZINE-2,3-DICARBONITRILE