You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named 5-amino-3-[(2R,3R,4S)-5-[2-[(2S,3R,4S,5R)-5-(6-aminopurin-9-yl)-4-fluoro-2-(phosphanyloxymethyl)oxolan-3-yl]ethylphosphanyloxy]-4-fluoro-3-hydroperoxythiolan-2-yl]-6H-triazolo[4,5-d]pyrimidin-7-one is given. What is its corresponding molecular formula?
user
C20H25F2N11O6P2S
assistant