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 3-[6-[4-(azepan-1-ylmethyl)pyridin-2-yl]-3-oxo-1H-isoindol-2-yl]piperidine-2,6-dione .
user
C25H28N4O3
assistant