The molecule is a polynucleotide comprised of guanosine units connected via 3'->5' phosphodiester linkages. It contains a GMP 3'-end residue, a GMP 5'-end residue and a guanosine 5'-monophosphate residue.
[(2R,3S,4R,5R)-5-(2-amino-6-oxo-1H-purin-9-yl)-3-[[(2R,3S,4R,5R)-5-(2-amino-6-oxo-1H-purin-9-yl)-3,4-dihydroxyoxolan-2-yl]methoxy-hydroxyphosphoryl]oxy-4-hydroxyoxolan-2-yl]methyl [(2R,3S,4R,5R)-5-(2-amino-6-oxo-1H-purin-9-yl)-4-hydroxy-2-(phosphonooxymethyl)oxolan-3-yl] hydrogen phosphate