You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 3-chloro-N-[(4-chloro-2-cyclohexylphenyl)sulfanylcarbamoyl]-5-(trifluoromethyl)pyridine-2-carboxamide into molecular formula.
user
C20H18Cl2F3N3O2S
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