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 8,8-dimethyl-9-oxo-4-[2-(trifluoromethyl)furan-3-carbonyl]-1-oxa-4-azaspiro[5.5]undec-10-ene-10-carbonitrile is given. What is its corresponding molecular formula?
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C18H17F3N2O4
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