MS:M+ is not seen but equals 144 . IR: Some wavenumbers are marked for clarity. Proton NMR: Note: J's not provided because of the complex splitting. A. Shift =0.8ppm,12H, doublet B. Shift =1.1ppm,2H, multiplet C. Shift =1.3ppm,4H, doublet of doublet D. Shift =1.9ppm,1H, multiplet E. Shift =3.9ppm,1H, broad. What is the numerical value of the base peak in the MS shown above? What is the minimum number of H present in the molecule? How do you know? What functional group(s) besides alkyl is/are present? Use other spectra to help. What is the likely molecular formula for the compound Draw a structure for the compound consistent with the information collected from the spectra