You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 2-[5-[2-chloro-4-(trifluoromethyl)phenoxy]-2-(4-methylphenyl)sulfonylphenoxy]acetonitrile by IUPAC nomenclature, provide its molecular formula.
user
C22H15ClF3NO4S
assistant