2-{(6,6-Dimethoxy-cyclohexa-2,4-dienyloxy)-[(2S,5R)-5-(5-methyl-2,4-dioxo-3,4-dihydro-2H-pyrimidin-1-yl)-2,5-dihydro-furan-2-ylmethoxy]-phosphorylamino}-propionic acid methyl ester AIDS-164144 AIDS164144