An aromatic compound $\text{'}\mathrm{A}\text{'}$ having molecular formula ${\mathrm{C}}_7{\mathrm{H}}_6{\mathrm{O}}_2$, on treating with aqueous ammonia and heating forms compound $\mathrm{\prime }\mathrm{B}\mathrm{\prime }$. The compound $\mathrm{\prime }\mathrm{B}\mathrm{\prime }$ on reaction with molecular bromine and potassium hydroxide provides compound $\mathrm{\prime }\mathrm{C}\mathrm{\prime }$ having molecular formula ${\mathrm{C}}_6{\mathrm{H}}_7\mathrm{N}$. The structure of $\mathrm{\prime }\mathrm{A}\mathrm{\prime }$ is: