C5H10O2的羧基和酯的同分异构体有那些?

CH3CH2CH2CH2COOH (CH3)2CHCH2COOH CH3CH2CH (CH3)COOH (CH3)3CCOOH HCOOCH2CH2CH2CH3 HCOOCH2CH(CH3)2 HCOOCH(CH3)CH2CH3 HCOOC(CH3)3 CH3COOCH2CH2CH3 CH3COOCH(CH3)2 CH3CH2COOCH2CH3 CH3CH2CH2COOCH3 (CH3)2CHCO...