hSTING activator-1 (Compound 68) is a STING agonist capable of effectively activating various human STING variants (R232, H232, HAQ), with EC50 values of 56 nM, 89 nM, and 51 nM, respectively. This compound activates the type I interferon pathway by directly binding to the STING protein and stabilizing its conformation, which leads to downstream IRF3 phosphorylation and cytokine release. hSTING activator-1 also demonstrates potential in cancer research by inhibiting fibrosarcoma tumor growth.