You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Under IUPAC nomenclature, a molecule named 2-chloro-N-[[4-ethyl-5-[2-(5-fluoro-2-methylanilino)-2-oxoethyl]sulfanyl-1,2,4-triazol-3-yl]methyl]benzamide is given. What is its corresponding molecular formula?
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C21H21ClFN5O2S
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