Method of treating with compounds of formula (I): wherein: n is 0 or 1, W represents —CO— or S(O)q and q is 0, 1 or 2, G represents a G1, G2, G3 or G4 group as defined in the description, Z represents alkyl, aryl, heteroaryl, arylalkyl, arylalkenyl, arylalkynyl, heteroarylakenyl, heteroarylalkynyl or heteroarylalkyl each optionally substituted, A represents a grouping selected from —A2—, —A1—A2—, —A2—A1—, and —A1—A2—A1— wherein A1 is alkylene and A2 represents phenylene, cycloalkylene, naphthylene or heteroarylene each optionally substituted, R represents hydrogen, alkyl, aryl, heteroaryl, arylalkyl arylalkenyl, arylalkynyl, heteroarylakenyl, heteroarylalkynyl or heteroarylalkyl each optionally substituted, R1 represents alkyl, aryl, heteroaryl, arylalkyl arylalkenyl, arylalkynyl, heteroarylakenyl, heteroarylalkynyl or heteroarylalkyl each optionally substituted, and medicinal products containing the same are useful as Neuropeptide Y receptor ligands.