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 4-[3-[(4-fluorophenyl)methyl]imidazo[4,5-b]pyridin-2-yl]-N-(3,4,5-trimethoxyphenyl)butanamide .
user
C26H27FN4O4
assistant