59742-68-6
diethyl 3-bromo-4-oxoheptanedioate
→
~90%
59742-69-7
diethyl 4-oxohept-2-enedioate
64-17-5
乙醇
+
502-51-2
2-oxo-3H-furan-3-carboxylic acid
6317-49-3
4-氧代庚二酸二乙酯