Various

Hint

Seeing potons with chemical shifts larger than 7 ppm usually triggers the idea "Benzene". Maybe there is another choice.

Hint

Maybe it is not recommendable to start analyzing the multiplets. The molecular dormulae doesn't offer that much possibilities and a lot of them might be excluded by simple boundary conditions.

Hint

Try to rewrite the long text describing the problem into a chemical reaction scheme.

Hint

After decomposing the proton multiplets getting the full structure should be not that difficult.

Hint

The two dimensional spectra are helpful to get an unambiguous solution.