The molecule is a mismatched double-stranded RNA with one strand being a polymer of inosinic acid, the other a polymer of cytidylic acid. It has a role as an immunological adjuvant. It contains a poly(inosinic acid) and a poly(cytidylic acid).
[(2R,3S,4R,5R)-5-(4-amino-2-oxopyrimidin-1-yl)-3-[[(2R,3S,4R,5R)-5-(4-amino-2-oxopyrimidin-1-yl)-3,4-dihydroxyoxolan-2-yl]methoxy-hydroxyphosphoryl]oxy-4-hydroxyoxolan-2-yl]methyl [(2R,3S,4R,5R)-5-(4-amino-2-oxopyrimidin-1-yl)-4-hydroxy-2-(phosphonooxymethyl)oxolan-3-yl] hydrogen phosphate;[(2R,3S,4R,5R)-3-[[(2R,3S,4R,5R)-3,4-dihydroxy-5-(6-oxo-1H-purin-9-yl)oxolan-2-yl]methoxy-hydroxyphosphoryl]oxy-4-hydroxy-5-(6-oxo-1H-purin-9-yl)oxolan-2-yl]methyl [(2R,3S,4R,5R)-4-hydroxy-5-(6-oxo-1H-purin-9-yl)-2-(phosphonooxymethyl)oxolan-3-yl] hydrogen phosphate