You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-[(3S)-4-[2-(dimethylamino)pyrimidine-5-carbonyl]morpholin-3-yl]-2-methyl-1H-pyrimidin-6-one is the IUPAC name of a molecule. Please give its molecular formula.
user
C16H20N6O3
assistant