You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 1-[(6-chloro-3H-pyrrolo[2,3-b]pyridin-5-yl)methyl]-3-(2-oxo-1H-pyridin-3-yl)-6,7-dihydro-5H-cyclopenta[f]indole-2-carboxylic acid by IUPAC nomenclature, provide its molecular formula.
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C25H19ClN4O3
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