AIDS-050450 AIDS050450 [4-(2-{[5-(5-Methyl-2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)-2,5-dihydrofuran-2-yl]methoxy}-2-oxoethyl)-5-oxo-1,3-dioxolan-4-yl]acetic acid d4T deriv.