N - [4 - (2,4-difluorophenyl) - 3 - (6-methyl-7-oxo-6, 7-dihydro-1h-pirol [2,3-c] piridin-4-il] phenylethane and its crystalline form are used as appropriate pharmacological components for the treatment of diseases such as cancer.N-[4-(2,4-difluorofenoxi)-3-(6-metil-7-oxo- 6,7-dihidro-1H-pirrol[2,3- c]piridin-4-il)fenil]etansulfonamida y formas cristalinas de los misma como ingrediente farmaceutico adecuado para composiciones farmaceuticas de utilidad en el tratamiento de enfermedades, por ejemplo, cancer