2-(6-Aminopurin-9-yl)-5-[({2-(6-aminopurin-9-yl)-5-[(oxyphosphinyloxyphosphinyl)methyl]oxolan-3-yl}phosphinyloxy)methyl]-4-hydroxyoxolan-3-yl [5-(6-aminopurin-9-yl)-4-hydroxyoxolan-2-yl]methyl hydrogen phosphatere 5'p-2',5',-Co-A-Co (Co = Cordycepin) AIDS-042764 AIDS042764