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 propyl 2-[[1-[(4-bromo-2-chlorophenoxy)methyl]pyrazole-3-carbonyl]amino]-5-carbamoyl-4-methylthiophene-3-carboxylate is given. What is its corresponding molecular formula?
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C21H20BrClN4O5S
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