酸4种 CH3CH2CH2CH2COOH(CH3)2CHCH2COOH CH3CH2CH(CH3)COOH (CH3)3CCOOH酯8种,你狠HCOOCH2CH2CH2CH3HCOOCH2CH(CH3)2HCOOCH(CH3)CH2CH3HCOOC(CH3)3CH3COOCH2CH2CH3CH3COOCH(CH3)2CH3CH2COOCH2CH3CH3CH2CH2COOCH3(CH3)...