You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-[[8-(2,6-difluorophenyl)-2-[2-(dimethylamino)ethylamino]-7-oxo-5,6-dihydropyrimido[4,5-d]pyrimidin-4-yl]methyl]benzamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C24H25F2N7O2
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