Aniline dissolved in dilute $\mathrm{H}\mathrm{C}\mathrm{l}$ is reacted with sodium nitrite at $0°\mathrm{C}$. This solution was added dropwise to a solution containing an equimolar mixture of aniline and phenol in dilute $\mathrm{H}\mathrm{C}\mathrm{l}$. The structure of the major product is