You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 2-[[2-(2,4-dichlorophenyl)acetyl]-[(3-methoxyphenyl)methyl]amino]-N-(2-methylpropyl)propanamide by IUPAC nomenclature, provide its molecular formula.
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C23H28Cl2N2O3
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