“…Several classes of compounds acting as CB2R agonists have been developed in the past years, bearing different scaffolds: dibenzopyran, , oxoquinoline, − naphthyridinone, − quinolinedione alkyloxy-coumarin indole, − indazole imidazopyridine, imidazopyrazine, benzimidazole, , purine, , thiophene, , triazine, , pyridinone, − biphenyl, , proline, , and piperidine . In Figure the most representative and selective known CB2R ligands are reported along with their K i values on CB1R and CB2R.…”