You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[(3,5-difluorophenyl)methyl]-3-oxo-2-propan-2-yl-2-azaspiro[3.5]nonane-1-carboxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C19H24F2N2O2
assistant