You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-[1-(2-fluoroprop-2-enoyl)azetidin-3-yl]-6-(trifluoromethyl)-1-[4-(trifluoromethyl)phenyl]imidazo[4,5-b]pyridin-2-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C20H13F7N4O2
assistant