The invention relates to molecules having Formula (100): ##STR00001## wherein ---------- represents a bond present or absent; Ar is a substituted or unsubstituted benzene or pyridine ring; V is a C or N atom, and W, X, Y and Z together form a 2,4-thiazolidinedione, 2-thioxo-4-thiazolidinedione, isoxazolidinedione, 2,4-imidazolidinedione, [1,2,4]-oxadiazolidine-3,5-dione or 2-thioxo-4-imidazolidinedione residue; or a pharmaceutically acceptable salt thereof.