You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance 1-(2-bromophenyl)-4-[1-[2-(2-methylpiperidin-1-yl)-2-oxoethyl]benzimidazol-2-yl]pyrrolidin-2-one .
user
C25H27BrN4O2
assistant