You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-[(7,7-difluoro-5-methyl-6-oxo-9-phenyl-8H-pyrimido[4,5-b][1,4]diazepin-2-yl)amino]-N-[2-(dimethylamino)ethyl]-3-methoxybenzamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C26H29F2N7O3
assistant