You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-(3,5-difluorophenyl)-1-[8-[[2-(2-methylpropoxy)phenyl]methyl]-2,8-diazaspiro[4.5]decan-2-yl]ethanone The above is the IUPAC name of a molecule. Write its molecular formula.
user
C27H34F2N2O2
assistant