You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-(4-hydroxycyclohexyl)-9-[4-(trifluoromethyl)phenyl]-2,9-diazaspiro[4.5]decan-1-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C21H27F3N2O2
assistant