The compounds of the formula (a) are described in the present and their uses for the treatment of diseases, conditions and / or Disorders mediated by Pharmaceutical compositions and their use as agents for the receiver asialoglicoprote u00edna (ASGPR).Los compuestos de la fórmula (A) se describen en la presente y sus usos para el tratamiento de enfermedades, condiciones y/o trastornos mediados por composiciones farmacéuticas y sus usos como agentes dirigidos al receptor de asialoglicoproteína (ASGPR).