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 2-fluoro-4-[4-[(1R)-3-(4-oxospiro[3,5,7,8-tetrahydroquinazoline-6,1'-cyclopropane]-2-yl)cyclopent-2-en-1-yl]piperazin-1-yl]benzonitrile is given. What is its corresponding molecular formula?
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C26H28FN5O
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