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 N-butyl-2-[2-[1-(2,3-dimethylphenyl)-5-oxopyrrolidin-3-yl]benzimidazol-1-yl]-N-methylacetamide .
user
C26H32N4O2
assistant