The invention relates to pyridin-3-yl derivatives of Formula (I)wherein R1, R2, R3, R4, R5; R6and A are 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)吡啶-3-基衍生物其中R1,R2,R3,R4,R5,R6及A均如說明文中所描述,其製備,及其作為醫藥活性化合物之用途。該化合物係特別充作免疫調制劑。