An organic acid $\mathbf{P}\left(\mathrm{C}_{11} \mathrm{H}_{12} \mathrm{O}_2\right)$ can easily be oxidized to a dibasic acid which reacts with ethylene glycol to produce a polymer dacron. Upon ozonolysis, $\mathbf{P}$ gives an aliphatic ketone as one of the products. $\mathbf{P}$ undergoes the following eaction sequences to furnish $\mathbf{R}$ via $\mathbf{Q}$. The compound $\mathbf{P}$ also undergoes another set of reactions to produce $\mathbf{S}$.
The compound S is