You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(2'R,3R,3'S,5'S)-6-chloro-3'-(2,3-difluorophenyl)-5'-(2,2-dimethylpropyl)-5-fluoro-N-(3-hydroxy-3-methylcyclobutyl)-2-oxospiro[1H-indole-3,4'-pyrrolidine]-2'-carboxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C28H31ClF3N3O3
assistant