The invention relates to pyridine derivatives of Formula (I)whereinA, R1, R2, R3, R4, R5, R6andR7are as described in the description, their preparation and their use as pharmaceutically active compounds. Said compounds particularly act as immunomodulating agents.本發明係關於式(I)之吡啶衍生物,其中A、R1、R2、R3、R4、R5、R6及R7係如說明書中所述;其製備及其作為醫藥活性化合物之用途。該等化合物尤其可發揮作為免疫調節劑之功用。