AIDS-082136 AIDS082136 Thiophosphoric acid O-[5-(2-amino-6-oxo-1,6-dihydro-purin-9-yl)-3,4-dihydroxy-tetrahydro-furan-2-ylmethyl] ester O'-[5-(6-amino-purin-9-yl)-2-hydroxymethyl-tetrahydro-furan-3-yl] ester