You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(5S)-2-(3-fluoro-4-methylbenzoyl)-9-(3-fluorophenyl)-6-methyl-2,6,9-triazaspiro[4.5]decan-8-one is the IUPAC name of a molecule. Please give its molecular formula.
user
C22H23F2N3O2
assistant