IUPAC:({[({[(1R,3R,4R,7S)-3-(2,4-dioxo-1,2,3,4-tetrahydropyrimidin-1-yl)-7-hydroxy-2,5-dioxabicyclo[2.2.1]heptan-1-yl]methoxy}(hydroxy)phosphoryl)oxy](hydroxy)phosphoryl}oxy)phosphonic acid
IUPAC:({[({[(1R,3R,4R,7S)-3-(2,4-dioxo-1,2,3,4-tetrahydropyrimidin-1-yl)-7-hydroxy-2,5-dioxabicyclo[2.2.1]heptan-1-yl]methoxy}(hydroxy)phosphoryl)oxy](hydroxy)phosphoryl}oxy)phosphonic acid