AIDS-111870 AIDS111870 Bis(MeSATE)d4TMP Thioacetic acid S-(2-{(2-acetylsulfanyl-ethoxy)-[5-(5-methyl-2,4-dioxo-3,4-dihydro-2H-pyrimidin-1-yl)-2,5-dihydro-furan-2-ylmethoxy]-phosphoryloxy}-ethyl) ester