AIDS-167616 AIDS167616 ORI-9020 Phosphoric acid, 5-(6-amino-purin-9-yl)-3-hydroxy-tetrahydro-furan-2-ylmethyl ester 5-(2,4-dioxo-3,4-dihydro-2H-pyrimidin-1-yl)-2-hydroxymethyl-4-methoxy-tetrahydro-furan-3-yl ester