497-25-6
恶唑烷-2-酮
+
2459-05-4
富马酸单乙酯
→
~54%
138710-30-2
ethyl 4-oxo-4-(2-oxo-1,3-oxazolidin-3-yl)but-2-enoate
26367-48-6
富马酸单乙酯酰氯
~45%