2-Amino-9-[4-({[5-(2-amino-6-oxohydropurin-9-yl)-3,4-dihydroxyoxolan-2-yl]methoxy}methoxy)-3-hydroxy-5-(hydroxymethyl)oxolan-2-yl]hydropurin-6-one AIDS-082155 AIDS082155 rGrG(3'-5'-formacetal)