You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 2-[(4-chlorophenyl)methyl]-3-(2,4-dichlorophenyl)-1-oxo-3,4-dihydroisoquinoline-4-carboxylic acid by IUPAC nomenclature, provide its molecular formula.
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C23H16Cl3NO3
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