You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Provide the molecular formula for the IUPAC named substance 4-O-ethyl 3-O-methyl (3S,3aR)-7,8,9-trifluoro-5-hydroxy-1-methyl-3,3a-dihydro-2H-pyrazolo[1,5-a]quinoline-3,4-dicarboxylate .
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