188781-08-0
4-甲基-2-氯嘧啶-5-羧酸乙酯
→
~77%
188781-10-4
2-氯-4-甲基-5-嘧啶羧酸
6319-01-3
ethyl 2-[(carbamoylamino)methylidene]-3-oxobutanoate