TLR7/8 agonist 8 (compound 24m) is a potent dual agonist for toll-like receptors 7 and 8 (TLR7/8), exhibiting half-maximal effective concentrations (EC50s) of 27 nM for human TLR7 (hTLR7) and 12 nM for human TLR8 (hTLR8). This compound has been shown to enhance the efficacy of PD-1/PD-L1 inhibitors in antitumor activity [1].

TLR7:27 nM (EC50), TLR8:12 nM (EC50)