You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-(2-phenylethenylsulfonyl)-N-[[4-(trifluoromethyl)phenyl]methyl]piperidine-4-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C22H23F3N2O3S
assistant