14. Compound I has a molecular formula C5H10O, and 1H-NMR data shown below: δ 0.95 (d, J = 7 Hz, 6H), 2.10 (s, 3H), 2.43 (m, 1H). What structure fits compound I?

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統計： A(0), B(6), C(0), D(2), E(16) #941838