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-cyclopropyl-2-ethyl-6,7-difluoro-4-oxo-8-(3-pyrrolidin-2-ylprop-1-ynyl)quinoline-3-carboxylic acid by IUPAC nomenclature, provide its molecular formula.
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C22H22F2N2O3
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