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 5-tert-butyl-3-(7-fluoro-3-methylidene-4-prop-2-ynylspiro[1,4-benzoxazine-2,1'-cyclopropane]-6-yl)-1,3,4-oxadiazol-2-one is given. What is its corresponding molecular formula?
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C20H20FN3O3
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