tlr4-in-c34 tlr4-in-c34 tlr4-in-c34 (or c34) is a drug which acts as a potent and selective antagonist of toll-like receptor 4 (tlr4). in animal studies it blocks tlr4-mediated cytokine release and has antiinflammatory effects. tlr4-in-c34identifiers iupac name methyl acetate cas number40592-88-9pubchem cid91691128chemspider34500445chemblchembl4303607chemical and physical dataformulac17h27no9molar mass389.401 g·mol−13d model (jsmol)interactive image smiles cc(c)o1((((o1)coc(=o)c)oc(=o)c)oc(=o)c)nc(=o)c inchi inchi=1s/c17h27no9/c1-8(2)24-17-14(18-9(3)19)16(26-12(6)22)15(25-11(5)21)13(27-17)7-23-10(4)20/h8,13-17h,7h2,1-6h3,(h,18,19)/t13-,14-,15-,16-,17+/m1/s1key:kmiqmfhpujudmc-hharlnausa-n