You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(2S)-2-(3,5-dimethylphenoxy)-1-[4-[3-(trifluoromethyl)phenyl]piperazin-1-yl]propan-1-one is the IUPAC name of a molecule. Please give its molecular formula.
user
C22H25F3N2O2
assistant