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 1-[7,8-dimethoxy-2-methyl-5-[4-(4-methylpiperazin-1-yl)phenyl]-1,2-dihydro-3-benzazepin-3-yl]ethanone .
user
C26H33N3O3
assistant