Chapter 15, Problem 55P

You have a sample of a compound of molecular formula ${\text{C}}_{\text{11}}{\text{H}}_{\text{15}}{\text{NO}}_{\text{2}}$, which has a benzene ring substituted

by two groups, ${\left({\text{CH}}_{\text{3}}\right)}_2\text{N}-$ and ${\text{CO}}_{\text{2}}{\text{CH}}_{\text{2}}{\text{CH}}_{\text{3}}-$, and exhibits the given ${}^{13}\text{C}\text{NMR}$. What disubstituted

benzene isomer corresponds to these ${}^{13}\text{C}$ data?