1-Methyl-1,4-dihydro-pyridine-3-carboxylic acid (2R,3S,5R)-2-hydroxymethyl-5-(5-iodo-2,4-dioxo-3,4-dihydro-2-H-pyrimidin-1-yl)-tetrahydro-furan-3-yl ester AIDS-113823 AIDS113823