You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance 2-[[3-(2,5-difluorophenyl)-2-fluorophenyl]methyl]-4-fluoro-3-(sulfanylamino)pyrrolidine-1-carbaldehyde .
user
C18H16F4N2OS
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