sec-butyl fomiat a. C6H5OOC-CH3 b. CH3COOCH(CH3)2 c. CH2=CHCOOCH=CH2 d. CH2=CHCOOCH-CH=CH2 e. HCOOCH(CH3)CH2CH317/30sec-butyl fomiat a. C6H5OOC-CH3 b. CH3COOCH(CH3)2 c. CH2=CHCOOCH=CH2 d. CH2=CHCOOCH-CH=CH2 e. HCOOCH(CH3)CH2CH31-b, 2-d, 3-a, 4-e.1-b, 2-c, 3-a, 4-e.1-d, 2-d, 3-a, 4-e.1-b, 2-d, 3-a, 4-c.Giải thíchĐáp án A