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 (2S)-2-[[2-(4-bromo-3-methylphenoxy)acetyl]-[(4-chlorophenyl)methyl]amino]-N-ethylbutanamide is given. What is its corresponding molecular formula?
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C22H26BrClN2O3
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