(S)-2-{[(2S,3S,5R)-3-Azido-5-(5-methyl-3-octyl-2,4-dioxo-3,4-dihydro-2H-pyrimidin-1-yl)-tetrahydro-furan-2-ylmethoxy]-phenoxy-phosphorylamino}-propionic acid methyl ester AIDS-185294 AIDS185294