57229-36-4
2,3-二甲基-5-羟基吡嗪
→
32493-62-2
5,6-dimethyl-1,4-dihydropyrazine-2,3-dione
100450-13-3
3-bromo-5,6-dimethyl-1H-pyrazin-2-one
32493-79-1
2,3-二氯-5,6-二甲基吡嗪