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 7-[(2,4-difluorophenyl)methyl]-2-pyridin-3-yl-3,5,6,8-tetrahydropyrido[3,4-d]pyrimidin-4-one .
user
C19H16F2N4O
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