4-[6-[3-[1-[(2R,4R,5R)-4-[2-[2-[2-[[(2R,3R,5R)-5-(4-amino-2-oxopyrimidin-1-yl)-3-hydroxyoxolan-2-yl]methoxy-hydroxyphosphoryl]oxyethoxy]ethoxy]ethoxy-hydroxyphosphoryl]oxy-5-[[hydroxy-[2-[2-[2-[2-[2-[2-[hydroxy-[2-[2-[2-[2-[2-(2-hydroxyethoxy)ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]phosphoryl]oxyethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]phosphoryl]oxymethyl]oxolan-2-yl]-2,4-dioxopyrimidin-5-yl]prop-2-enoylamino]hexylcarbamoyl]-2-(3-hydroxy-6-oxoxanthen-9-yl)benzoic acid