The invention relates to pyridine derivatives of Formula (I), wherein A, R1, R2, R3, and R4 are as described in the description, their preparation and their use as pharmaceutically active compounds. Said compounds particularly act as immunomodulating agents.
本发明涉及式(I)的
吡啶衍生物,其中A、R1、R2、R3和R4如描述中所述,它们的制备以及它们作为药物活性化合物的用途。这些化合物特别作为免疫调节剂。