Abstract: The invention relates to a method of treatment and/or prophylaxis of diseases and conditions mediated by peroxysome proliferator-activated receptor gamma (PPAR?) in a mammal subject in need thereof, said method comprising administration to said mammal a compound of formula (I) or a pharmaceutically acceptable salt thereof in a therapeutically or prophylactically effective amount wherein in formula (I) W represents a COOH group or its bioisosters, or COO—C1-C4-alkyl group; Y represents NH or N—C1-C10-alkyl; Z represents NH, N—C1-C10-alkyl, N-aryl, N-heteroaryl, S, or O; X represents O, S, NH, N—C1-C10-alkyl, N-aryl, NSO2—C1-C10-alkyl, N—SO2-aryl, or N S02-heteroaryl; R1 to R6 each independently represents a hydrogen atom or a substituent defined in the description; A is as defined in the description; n represents an integer from 0 to 4, inclusive. The compounds of formula (I) are the ligands of PPAR-gamma receptor.