You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1,1,1-trifluoro-N-[1-[4-[[2-(2-fluorophenyl)sulfonyl-4-(trifluoromethoxy)phenyl]methyl]phenyl]ethyl]methanesulfonamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C23H18F7NO5S2
assistant