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-methyl-8-[4-[(6-methylpyridin-3-yl)methoxy]-2-oxopyridin-1-yl]-1,3,4,5-tetrahydroazepino[4,3-b]indole-2-carboxylic acid .
user
C26H26N4O4
assistant