2-Amino-9-[3-({[5-(2-amino-6-oxohydropurin-9-yl)-3,4-dihydroxyoxolan-2-yl]methoxy}methoxy)-4-hydroxy-5-(hydroxymethyl)oxolan-2-yl]hydropurin-6-one AIDS-082154 AIDS082154 rGrG(2'-5'-formacetal)