The molecule is an organophosphate oxoanion that is the conjugate base of guanylyl-(3'->5')-cytidine, obtained by deprotonation of the phosphate group. It is a conjugate base of a guanylyl-(3'->5')-cytidine.
[(2R,3S,4R,5R)-5-(2-amino-6-oxo-1H-purin-9-yl)-4-hydroxy-2-(hydroxymethyl)oxolan-3-yl] [(2R,3S,4R,5R)-5-(4-amino-2-oxopyrimidin-1-yl)-3,4-dihydroxyoxolan-2-yl]methyl phosphate