(S)-2-({(2R,3S,5R)-5-[5-((E)-2-Bromo-vinyl)-2,4-dioxo-3,4-dihydro-2H-pyrimidin-1-yl]-3-hydroxy-tetrahydro-furan-2-ylmethoxy}-phenoxy-phosphorylamino)-propionic acid benzyl ester AIDS-122707 AIDS122707