You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (1S,2S)-2-[(4-chlorophenyl)sulfonyl-[[4-(trifluoromethyl)phenyl]methyl]amino]cyclohexane-1-carboxamide by IUPAC nomenclature, provide its molecular formula.
user
C21H22ClF3N2O3S
assistant