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 7-chloro-3-(1-methylimidazol-2-yl)-4-oxo-2-phenyl-2,3-dihydro-1H-quinoline-5-carboxylic acid is given. What is its corresponding molecular formula?
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C20H16ClN3O3
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