You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[1-(2,2-difluoroethyl)pyrazol-3-yl]-3-[[(1R,2R)-2-phenylcyclopropyl]methyl]urea The above is the IUPAC name of a molecule. Write its molecular formula.
user
C16H18F2N4O
assistant