109159-87-7
6-ethyl-7-hydroxy-3,4-dimethyl-coumarin
+
77-78-1
硫酸二甲酯
→
108904-80-9
6-ethyl-7-methoxy-3,4-dimethylchromen-2-one
2896-60-8
4-乙基间苯二酚
609-14-3
2-甲基乙酰乙酸乙酯