Selective, non-peptide CCR8 chemokine receptor agonist (IC50 values are 1.8 and 2.6 μM for human and mouse receptors respectively). Displays no activity at CCR4, CXCR3, CXCR4 and CCR5 and shows > 28-fold selectivity over 26 other GPCRs (less selective at α2A and 5-HT receptors). Induces chemotaxis and inhibits Env-mediated (HIV) cell-cell fusion.