You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-[3-[[3-fluoro-5-(trifluoromethyl)phenyl]sulfonylmethyl]cyclopentyl]-1-[2-methyl-5-(trifluoromethyl)pyrazol-3-yl]propan-1-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C21H21F7N2O3S
assistant