2,4,6,8-Tetraoxa-5-phosphanonanedioic acid, 5-[[2-(6-amino-9H-purin-9-yl)-1-methylethoxy]methyl]-, bis(1,1-dimethylethyl) ester, 5-oxide, (R)- 201341-01-7 AIDS-028959 AIDS028959 Bis(t-ButylOC)PMPA Tenofovir prodrug