You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 8-(2,6-difluorophenyl)-4-(4-fluoro-2-methylphenyl)-2-(piperidin-4-ylamino)pyrido[2,3-d]pyrimidin-7-one by IUPAC nomenclature, provide its molecular formula.
user
C25H22F3N5O
assistant