You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[(1S)-2,2,2-trifluoro-1-(6-hexoxynaphthalen-1-yl)ethyl]pyrazolidin-3-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C21H25F3N2O2
assistant