854015-42-2
ethyl 5-bromo-4-methylisoxazole-3-carboxylate
→
~75%
854015-45-5
5-溴-4-甲基-3-异噁唑甲醇
84280-59-1
ethyl 4-methyl-5-oxo-2H-oxazole-3-carboxylate
759-65-9
草酰丙酸二乙酯