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 4-chloro-N-[2-oxo-2-[2-[(2-oxo-1H-quinolin-3-yl)methylidene]hydrazinyl]ethyl]benzamide is given. What is its corresponding molecular formula?
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C19H15ClN4O3
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