You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[(2R,3R,5R)-5-ethyl-2-[2-(2-methylpropanoylamino)-6-oxo-1H-purin-9-yl]oxolan-3-yl] N-[[(2R,3R,4R,5R)-3-[tert-butyl(dimethyl)silyl]oxy-4-fluoro-5-purin-9-yloxolan-2-yl]methyl]sulfamate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C31H45FN10O8SSi
assistant