188781-10-4
2-氯-4-甲基-5-嘧啶羧酸
→
~61%
188781-13-7
5-嘧啶羰基氯化,2-氯-4-甲基-(9CI)
79-37-8
草酰氯
+
188781-08-0
4-甲基-2-氯嘧啶-5-羧酸乙酯
6319-01-3
ethyl 2-[(carbamoylamino)methylidene]-3-oxobutanoate