{[(2S,3R,4R,5R)-5-(6-amino-9H-purin-9-yl)-2-({[({[(3S)-3-({2-[(2-{[(2E)-3-[4-(dimethylamino)phenyl]prop-2-enoyl]sulfanyl}ethyl)carbamoyl]ethyl}carbamoyl)-3-hydroxy-2,2-dimethylpropoxy](hydroxy)phosphoryl}oxy)(hydroxy)phosphoryl]oxy}methyl)-4-hydroxyoxolan-3-yl]oxy}phosphonic acid