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 (2R)-N-(2,5-dimethylpyrimidin-4-yl)-3-methyl-2-(3-oxo-1H-isoindol-2-yl)butanamide .
user
C19H22N4O2
assistant