The following spectra are taken from a compound that is an important starting material for organic synthesis. Determine the structure, first by considering each spectrum individually, then by considering all the spectra together. Assign peaks to show that your proposed structure accounts for all the major features of each spectrum.

100 68 60 40 96 M 10 20 30 40 50 60 70 80 90 100 110 120 130 140 50 160 m/z wavelength (um) 4 4.5 2.5 100 3 5.5 6 10 1 2 13 14 15 16 1685 4000 3500 3000 2500 2000 1800 1600 1400 1200 1000 wavenumber (cm) 60 40 20 0 180 160 140 120 100 200 CH(CH,) 3C NMR (CH) CDCl3 (CH) 50Hz OHz 50Hz 6. 6.08 7.18 708 0 10