You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule 6-[[6-(3,4-difluorophenyl)pyridin-3-yl]methyl]-2-phenyl-3,5,7,8-tetrahydropyrido[4,3-d]pyrimidin-4-one .
user
C25H20F2N4O
assistant