The present invention relates to a compound of Formula (I): or a pharmaceutically acceptable salt thereof, corresponding pharmaceutical compositions, compound preparation and treatment methods directed to bacterial infections and inhibition of bacterial peptide deformylase (PDF) activity.COMPUESTOS DERIVADOS DE 2-(2-METILPROPANOIL)PIRAZOLIDIN-3-CARBOXAMIDA, INHIBIDORES DE LA PEPTIDO DESFORMILASA (PDF); COMPOSICIÓN FARMACEUTICA, UTILES EN EL TRATAMIENTO DE UNA INFECCION BACTERIANA.