You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the compound with this IUPAC name 3-[6-[(3-amino-3-methylazetidin-1-yl)methyl]-3-oxo-1H-isoindol-2-yl]piperidine-2,6-dione ?
user
C18H22N4O3
assistant