You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 2,3-dichloro-N-[1-[(3-methoxyphenyl)methyl]-3,5-dimethylpyrazol-4-yl]benzamide by IUPAC nomenclature, provide its molecular formula.
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C20H19Cl2N3O2
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