The invention relates to compounds of Formula (I) wherein X, Y, R1, R2, R3, R4 and R5 are as described in the description; to pharmaceutically acceptable salts thereof, and to the use of such compounds as medicaments, especially as modulators of the CXCR3 receptor.本發明係關於式(I)之化合物,□其中X、Y、R1、R2、R3、R4及R5係如說明書中所述;關於其醫藥上可接受之鹽及該等化合物作為藥劑,尤其作為CXCR3受體之調節劑的用途。