Several lead compounds CS-1018, CS-1020 and CS-1010 activate mouse and human STING variants in vitro with much better potency than natural ligand cGAMP and reference compound X. CS-1018 demonstrated dose dependent robust antitumor activity in B16F10 and MC38 mouse models....We have identified several STING agonists, which demonstrated better cellular potency to mouse and human STING alleles compared to natural ligand cGAMP and reference compound.