AIDS-082149 AIDS082149 Phosphoric acid 5-(2-amino-6-oxo-1,6-dihydro-purin-9-yl)-4-fluoro-2-hydroxymethyl-tetrahydro-furan-3-yl ester (dibutylamino-oxo-1,6-dihydro-purin-9-yl)-dihydroxy-tetrahydro-furan-2-ylmethyl ester