Based on following information, determine the molecular formula, index of hydrogen deficiency and the chemical structure of the molecule. You should also explain why for each spectrum. The answer compound provides an imine compound by reacting with acetaldehyde.

Exact Mass: 73.0896 737 100 % of Base Peak 50 417 44 567 40 45 50 60 65 70 75 55 m/z -779 1000 -1088 -1311 1381 -1466 -1 574 2000 Wavenumbers (cm) a-2870 2931 -2954 3000 -3309 4000 100 95 % Transmittance WWW 2.7 2.6 2.5 2.4 2.3 2.2 2.1 2.0 1.9 1.8 1.7 1.6 1.5 1.4 1.3 1.2 1.1 1.0 0.9 0.8 ppm