You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[1'-[(3-chlorophenyl)methyl]-5-fluorospiro[2H-indole-3,4'-piperidine]-1-yl]-cyclobutylmethanone The above is the IUPAC name of a molecule. Write its molecular formula.
user
C24H26ClFN2O
assistant