You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[[1-[(3-chloro-4-fluorophenyl)methyl]-4-fluoropiperidin-4-yl]methyl]-5,6-dimethoxy-2,3-dihydro-1-benzothiophene 1,1-dioxide is the IUPAC name of a molecule. Please give its molecular formula.
user
C23H26ClF2NO4S
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