You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance 3-chloro-2-(8-fluoro-2-oxospiro[1,3-dihydroquinazoline-4,1'-cyclohexane]-5-yl)oxybenzonitrile .
user
C20H17ClFN3O2
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