109-65-9
正溴丁烷
+
66123-43-1
4-(4-hydroxyphenyl)-4-oxobutanoic acid ethyl ester
→
63471-88-5
4-(4-丁氧苯基)-4-氧代丁酸
108-30-5
丁二酸酐
1126-79-0
丁氧基苯