You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule [[[(2R,3S,4R,5R)-5-[5-[3-(6-aminohexanoylamino)prop-1-ynyl]-2,4-dioxopyrimidin-1-yl]-3,4-dihydroxyoxolan-2-yl]methoxy-oxidophosphoryl]oxy-oxidophosphoryl] hydrogen phosphate .
user
C18H26N4O16P3-3
assistant