You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[[5-(2-amino-6-oxo-1H-purin-9-yl)-3-[[[1-[5-[4-formamido-3-(methylamino)thiolan-2-yl]pentanoylamino]-2-methylpropan-2-yl]disulfanyl]methoxy]oxolan-2-yl]methoxy-hydroxyphosphoryl] phosphono hydrogen phosphate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C26H45N8O15P3S3
assistant