83727-13-3
2,5-dihydroxy-3,6-dimethylpyrazine 1,4-dioxide
→
~38%
83727-16-6
喹喔啉,2-乙基-1,2,3,4-四氢-6,7-二甲基-
27023-10-5
27023-19-4
2,5-二氯-3,6-二甲基吡嗪