Agomelatine Urea and its Impurities

Agomelatine-urea complex, solid state forms of said Agomelatine-urea complex, processes for their preparation, and pharmaceutical compositions comprising an Agomelatine-urea complex or a solid state form thereof. Reference standards of Agomelatine Urea API,and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below.