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 (2R)-N-[(2S)-butan-2-yl]-2-[(3,4-dichlorophenyl)methyl-[2-(4-iodophenoxy)acetyl]amino]butanamide is given. What is its corresponding molecular formula?
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C23H27Cl2IN2O3
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