You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
6-[(dimethylamino)methyl]-2-[(1-methylimidazol-2-yl)methyl]-3-oxo-1H-isoindole-1-carbonitrile is the IUPAC name of a molecule. Please give its molecular formula.
user
C17H19N5O
assistant