(2R)-2-[(2S)-2-[(2R)-2-{[(2R,3S,4S,5R,6S)-2-({[({[(2S,3R,4R,5R)-5-(2,4-dioxo-1,2,3,4-tetrahydropyrimidin-1-yl)-3,4-dihydroxyoxolan-2-yl]methoxy}(hydroxy)phosphoryl)oxy](hydroxy)phosphoryl}oxy)-3-acetamido-5-hydroxy-6-(hydroxymethyl)oxan-4-yl]oxy}propanamido]propanamido]pentanedioic acid