You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-[(2R,3S,4R,5R)-5-[[(2S,3S,5R)-5-(6-aminopurin-9-yl)-2-ethyl-4-methoxy-2-(phosphanyloxymethyl)oxolan-3-yl]methoxyphosphanyloxymethyl]-4-fluoro-3-sulfanyloxyoxolan-2-yl]-4H-imidazo[1,2-a]purin-9-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C26H33FN10O8P2S
assistant