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 2-[1-[(4-chlorophenyl)methyl]indol-3-yl]-2-oxo-N-pyridin-2-ylacetamide is given. What is its corresponding molecular formula?
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C22H16ClN3O2
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