You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule (2S)-N-[2-chloro-4-[(4-fluorophenyl)sulfonylamino]phenyl]-2-(3,5-dimethylpyrazol-1-yl)propanamide into molecular formula.
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C20H20ClFN4O3S
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