You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 3-[(2S)-1-amino-3-[2-(trifluoromethyl)phenyl]propan-2-yl]-4-(4-chloro-2-methylpyrazol-3-yl)-5-ethylthiophene-2-carboxamide by IUPAC nomenclature, provide its molecular formula.
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C21H22ClF3N4OS
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