You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(3S)-4-(4-aminopyrido[3,2-d]pyrimidin-2-yl)-N-[6-(3,3-difluoroazetidin-1-yl)-2-methylpyridin-3-yl]-3-methylpiperazine-1-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C22H25F2N9O
assistant