You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3,4-difluoro-N-[[1-(thiophen-3-ylmethyl)piperidin-4-yl]methyl]benzenesulfonamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C17H20F2N2O2S2
assistant