You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[[(1R)-1-[5-(2-amino-5-fluoro-4-oxo-3H-pyrrolo[2,3-d]pyrimidin-7-yl)-4-chloro-4-ethynyl-3-(hydroxymethyl)oxolan-2-yl]ethoxy]-hydroxyphosphoryl] phosphono hydrogen phosphate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C15H19ClFN4O13P3
assistant