ETI41 is an orally active, selective TLR inhibitor that targets the nucleoside-binding Site I on TLR7 (IC50 = 0.63 µM) and TLR9 (IC50 = 0.16 µM), sparing surface TLRs (including TLR1/TLR2, TLR2/TLR6, TLR4 and TLR5). ETI41 potently inhibits endosomal TLR-mediated pro-inflammatory signaling with nanomolar activity in cellular, biophysical and in vivo assays. ETI41 suppresses the expression of inflammation-associated genes and effectively ameliorates symptoms in mouse models of psoriasis, and systemic lupus erythematosus (SLE). ETI41 can be used for autoimmune and inflammatory diseases research[1].