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)-6-[(Z)-2-(methyliminomethyl)pent-2-enyl]-1,4,5,7-tetrahydropyrazolo[3,4-c]pyridin-3-one by IUPAC nomenclature, provide its molecular formula.
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C19H23ClN4O
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