You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[4-chloro-2-(trifluoromethyl)phenyl]-2,6-dimethyl-4-(1,1,3-trioxo-1,2-thiazolidin-2-yl)benzenesulfonamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C18H16ClF3N2O5S2
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