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 (3,4-dichlorophenyl)-[4-(1H-pyrrolo[3,2-b]pyridin-3-yl)piperidin-1-yl]methanone is given. What is its corresponding molecular formula?
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C19H17Cl2N3O
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