Chemokine receptor binding heterocyclic compounds

A compound of the formula

• and the pharmaceutically acceptable salts thereof wherein:
• each n is independently 0-2;
• each R is independently H or alkyl (1-6C);
• Ar is phenylene;
• each Y is independently optionally substituted pyrimidyl, imidazole, pyridyl, benzimidazole, or benzooxazole;
• and
• L2 is a covalent bond or a C1-6 alkylene,
• wherein said optional substituents are independently halogen, nitro, cyano, carboxylic acid, alkyl, alkenyl, cycloalkyl, hydroxyl, thiol, or amino, acyl;
• wherein the hydroxyl and thiol groups may be substituted by C1-10 alkyl or by C2-4 alkanoyl;
• and
• wherein an amino group may also be substituted once or twice with C1-10 alkyl, alkenyl or C2-4 alkanoyl.