The molecule is an organophosphate oxoanion obtained by deprotonation of the phosphate and triphosphate OH groups of pppGp(2'->5')A; major species at pH 7.3.
[[[(2R,3R,4R,5R)-5-(2-amino-6-oxo-1H-purin-9-yl)-4-[[(2R,3S,4R,5R)-5-(6-aminopurin-9-yl)-3,4-dihydroxyoxolan-2-yl]methoxy-oxidophosphoryl]oxy-3-hydroxyoxolan-2-yl]methoxy-oxidophosphoryl]oxy-oxidophosphoryl] phosphate