You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 4-(4-methylsulfonylphenoxy)-N-[2-methyl-1-[3-(trifluoromethyl)phenyl]propyl]butanamide by IUPAC nomenclature, provide its molecular formula.
user
C22H26F3NO4S
assistant