You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
hydroxy-oxo-sulfanylidene-[2,3,4,5-tetrafluoro-6-[(E)-1,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,9-heptadecafluoronon-1-enyl]phenyl]-lambda6-sulfane is the IUPAC name of a molecule. Please give its molecular formula.
user
C15HF21O2S2
assistant