An activator of STING; induces expression of IFN-β and the pro-inflammatory cytokines TNF-α, IL-6, and Mcp-1 in murine BMMs isolated from wild-type, but not STING-/-, mice; induces IFN-β expression in PBMCs isolated from donors carrying STINGWT/WT, STINGWT/REF, and STINGWT/HAQ alleles; initiates tumor regression and prevents tumor growth upon tumor cell reimplantation in 4T1 breast and CT26 colon cancer mouse xenograft models,