221558-32-3
→
~46%
89282-09-7
2-甲基噁唑-4-甲腈
10200-43-8
2-甲基-4-恶唑甲酸乙酯
100959-91-9
2-甲基噻唑-4-甲酰胺
73859-07-1
N-cyanomethyl-acetimidic acid ethyl ester
+
109-94-4
甲酸乙酯