You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-[N-(2,2-difluoroethyl)-3-[2-[1-(difluoromethyl)cyclopropyl]ethynyl]-2-fluoroanilino]-5-fluoro-1H-quinazolin-2-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C22H15F6N3O
assistant