Câu trả lời tốt nhất
CH3-OOC-COO-CH2-CH3
CH3-OOC-CH2-COO-CH3
HCOO-CH2-CH2-OOC-CH3
HCOO-CH(CH3)-OOC-CH3
HCOO-CH2-OOC-CH2-CH3
CH3COO-CH2-OOC-CH3
HCOO-CH2-CH2-CH2-OOCH
HCOO-CH(CH3)-CH2-OOCH
HCOO-CH(C2H5)-OOCH
HCOO-C(CH3)2-OOCH
HCOO-CH2-COO-CH2-CH3
CH3COO-CH2-COO-CH3
HCOO-CH2-CH2-COO-CH3
HCOO-CH(CH3)-COO-CH3
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