108-24-7
乙酸酐
+
33693-66-2
α-Azido-γ-butyrolacton
→
~87%
4894-12-6
2-methyl-4-propan-2-ylidene-1,3-oxazol-5-one
90237-92-6
N-(5-oxo-2H-furan-4-yl)acetamide