80370-42-9
2-甲酰基-3-氧代丙酸乙酯
→
106944-54-1
ethyl 5-cyano-6-methylpyridine-3-carboxylate
861407-17-2
ethyl 2-formyl-3-(tosyloxy)acrylate
+
763-33-7
2-amino-1-propenecarbonitrile