You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-(1,1,1,3,3,3-hexafluoro-2-methylpropan-2-yl)-3-[4-(trifluoromethoxy)phenyl]urea The above is the IUPAC name of a molecule. Write its molecular formula.
user
C12H9F9N2O2
assistant