(R)-2-[(2S,3S,4S)-3,4-Dihydroxy-6-(1-pyrrolidin-1-yl-methanoyl)-3,4-dihydro-2H-pyran-2-yloxy]-2-[(2S,3S,4R,5R)-5-(2,4-dioxo-3,4-dihydro-2H-pyrimidin-1-yl)-4-hydroxy-3-methoxy-tetrahydro-furan-2-yl]-acetamide AIDS-189117 AIDS189117