1、CH3CH2CH2COOCH3

2、CH3CHCOOCH3
CH3
3、CH3CH2COOCH2CH3
4、CH3COOCH2CH2CH3
5、CH3COOCHCH3
CH3
6、HCOOCH2CH2CH2CH3
7、HCOOCHCH2CH3（该异构体存在一对对映异构）
CH3
8、HCOOCH2CHCH3
CH3
9、CH3
HCOOCCH3
CH3