5. A compound has the molecular formula, C₆H₁₂O₂. Its IR spectrum shows a strong absorption band near 1740 cm⁻¹; its ¹H NMR spectrum consists of two singlets, at δ 1.2 and 3.6 ppm. The most likely structure for this compound is:
(A) Isopropyl propionate
(B) Propyl propionate
(C) Ethyl isobutyrate
(D) tert-Butyl acetate
(E) Methyl pivalate

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統計： A(0), B(1), C(0), D(0), E(0) #3856535