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 (5S)-5-[(5-iodo-3-oxo-1H-isoindol-2-yl)methyl]-5-(pyridin-3-ylmethyl)imidazolidine-2,4-dione .
user
C18H15IN4O3
assistant