1,2-Dibenzyl 3-{[5-(5-methyl-2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)-2,5-dihydrofuran-2-yl]methyl} 2-hydroxypropane-1,2,3-tricarboxylate AIDS-050452 AIDS050452 d4T deriv.