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 2-[1-(5,6-dihydrobenzo[b][1]benzazepin-11-yl)-1-oxopropan-2-yl]isoindole-1,3-dione .
user
C25H20N2O3
assistant