The present Invention provides a compound of formula (i), which acts as an inhibitor for the treatment of cancer. Where: The Ring C is selected 1h pyrazole, among others to select metilpiridin - 1 - 2 (1H) - One, among others. B Selects Chlorine phenyl, among others.Preferred compounds are: 4 - (4-chlorophenyl) - 2 - (4 - metoxibenzil) - 3 - methyl - 5 - (1 - methyl - 2 - oxo - 1.6 - dihidropiridin - 3 - yl) - 4.5 - 5-methyl-4-oxo-1,4-dihydropyrrolo [3,4-c] pyrazole (2H) - 6 - (4 - One 4-chlorophenyl) - 3 - methyl - 5 - (1 - methyl - 2 - oxo - 1.6 - dihidropiridin - 3 - yl) - 4.5 - 5-methyl-4-oxo-1,4-dihydropyrrolo [3,4-c] pyrazole - 6 (2H) - OneLa presente invencion proporciona un compuesto de la formula (I) que actua como inhibidor BET para el tratamiento de cancer. Donde: el anillo C se selecciona de 1H-pirazol, entre otros A se selecciona de 1-metilpiridin-2(1H)-ona, entre otros. B se selecciona de cloro fenil, entre otros. Son compuestos preferidos: 4-(4-clorofenil)-2-(4-metoxibenzil)-3-metil-5-(1-metil-6-oxo-1,6-dihidropiridin-3-il)-4,5-dihidropirrolo[3,4-c]pirazol-6(2H)-ona 4-(4-clorofenil)-3-metil-5-(1-metil-6-oxo-1,6-dihidropiridin-3-il)-4,5-dihidropirrolo[3,4-c]pirazol-6(2H)-ona
