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From the molecular formula, the compound has "4 degree of unsaturation" (four double bonds or rings), suggesting the possibility of an aromatic compound (benzene has four degrees of unsaturation).
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The proton NMR has two peaks; a singlet at 
7.1 (5H) and a singlet at 2.3 (3H). The peak at 7.1 is in the aromatic region, suggesting a mono-substituted aromatic compound; the peak at 2.3 is in the region for a methyl group adjacent a mildly electronegative group. Although mono-substituted aromatic compounds have three types of hydrogens on the ring, coupling constants between these are generally small and the chemical shifts for all three are generally comparable, making the predicted multiplet appear as a singlet.
