18152-79-9
3-溴-5-乙氧甲酰基-4,6-二甲基-2-吡喃酮
→
35500-60-8
5-bromo-2,4-dimethyl-6-oxo-6H-pyran-3-carboxylic acid
+
669-95-4
3-bromo-4,6-dimethylpyran-2-one