You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[3-(difluoromethoxy)phenyl]-2-pyridin-3-yl-6-(2,2,2-trifluoroethyl)quinazolin-4-amine is the IUPAC name of a molecule. Please give its molecular formula.
user
C22H15F5N4O
assistant