AIDS-088131 AIDS088131 IsodApdC Phosphoric acid 5-(4-amino-2-oxo-2H-pyrimidin-1-yl)-3-hydroxy-tetrahydro-furan-2-ylmethyl ester 4-(6-amino-purin-9-yl)-2-hydroxymethyl-tetrahydro-furan-3-yl ester