You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule 1-cyclopropyl-8-ethoxy-6-fluoro-4-oxo-7-[(3S)-3-[(2,2,2-trifluoroacetyl)amino]pyrrolidin-1-yl]quinoline-3-carboxylic acid .
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C21H21F4N3O5
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