The molecule is a nucleoside triphosphate(4-) obtained by global deprotonation of the triphosphate OH groups of XTP; major species present at pH 7.3. It is a conjugate base of a XTP(3-).
[[[(2R,3S,4R,5R)-5-(2,6-dioxo-3H-purin-9-yl)-3,4-dihydroxyoxolan-2-yl]methoxy-oxidophosphoryl]oxy-oxidophosphoryl] phosphate