IR absorptions at 1630 cm⁻¹ and 1685 cm⁻¹ were observed for an unknown compound with molecular formula C₄H₅BrO. The proton NMR spectrum of the compound shows two doublets at 6.8 ppm and 7.5 ppm, respectively, with J = 15 Hz and one singlet at 2.3 ppm. Predict the structure consistent with the above information.