5965-53-7
2-氧代戊烷-1,5-二甲酸二乙酯
→
89943-56-6
ethyl 6-oxo-4,5-dihydro-1H-pyridazine-3-carboxylate
27372-38-9
6-氧-1,4,5,6-四氢吡哒嗪-3-羧酸
+
64-17-5
乙醇
63001-31-0
3-哒嗪酮-6-甲酸乙酯