1-(2-Deoxy-2-fluoro-5-O-(hydroxy((hydroxy(phosphonooxy)phosphinyl)oxy)phosphinyl)-beta-D-arabinofuranosyl)-5-methyl-2,4(1H,3H)-pyrimidinedione 2,4(1H,3H)-Pyrimidinedione, 1-(2-deoxy-2-fluoro-5-O-(hydroxy((hydroxy(phosphonooxy)phosphinyl)oxy)phosphinyl)-beta-D-arabinofuranosyl)-5-methyl- 79551-89-6