Chemical Formula: C27H33N8O18P3

[[(2R,3R,4R,5R)-5-(6-aminopurin-9-yl)-3-hydroxy-4-phosphonooxyoxolan-2-yl]methoxy-hydroxyphosphoryl] [(2R,3S,4R,5R)-5-[3-carbamoyl-4-(pyridine-4-carbonyl)-4H-pyridin-1-yl]-3,4-dihydroxyoxolan-2-yl]methyl hydrogen phosphate