Synonyms: Guanine ribonucleotidyl-(3'-5')-adenosine;Adenylyl-(5'.3')-guanosine;Guanosine, adenylyl-(5'-3')-;(2R,3S,4R,5R)-5-(2-amino-6-oxo-3,6-dihydro-9H-purin-9-yl)-4-hydroxy-2-(hydroxymethyl)tetrahydrofuran-3-yl [(2R,3S,4R,5R)-5-(6-amino-9H-purin-9-yl)-3,4-dihydroxytetrahydrofuran-2-yl]methyl hydrogen phosphate (non-preferred name)