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 4-(1-acetyl-2,3-dihydroindol-5-yl)-N-[2-[(2R)-2-methylpiperidin-1-yl]ethyl]benzamide .
user
C25H31N3O2
assistant