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 3-[3-[methyl-[2-[4-[[methyl-(2-methylphenyl)carbamoyl]amino]phenyl]acetyl]amino]phenyl]butanoic acid is given. What is its corresponding molecular formula?
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C28H31N3O4
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