You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (E)-3-[4-[[4-[(5-fluorospiro[1H-2-benzofuran-3,4'-piperidine]-1'-yl)methyl]phenyl]methoxy]phenyl]-N-methylbut-2-enamide by IUPAC nomenclature, provide its molecular formula.
user
C31H33FN2O3
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