For the following structure, draw the protons and label the proton environments a-j. For the NMR produced for that structure label the peaks according to the environment. Give a detailed reason for each peak how it deduced? Explain the chemical shifts and integration for each peak.

Comment on the purity of this product.

\begin{tabular}{|l|l|l|} \hline & Chemical shift (ppm) & Integration \\ \hline & 7.28 & 2 \\ \hline & 7.19 & 1 \\ \hline & 7.12 & 2 \\ \hline & 5.28 & 1 \\ \hline & 4.40 & 1 \\ \hline & 4.10 & 1 \\ \hline & 4.02 & 1 \\ \hline & 2.82 & 1 \\ \hline & 2.80 & 1 \\ \hline \end{tabular}