(S)-1-{[(2S,5R)-5-(5-Methyl-2,4-dioxo-3,4-dihydro-2H-pyrimidin-1-yl)-2,5-dihydro-furan-2-ylmethoxy]-phenoxy-phosphoryl}-pyrrolidine-2-carboxylic acid benzyl ester AIDS-185264 AIDS185264