You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[2-[(2R,3R)-4-[2-(dimethylamino)acetyl]-2,3-dimethylpiperazine-1-carbonyl]phenyl]-1,3-diazinane-2,4-dione The above is the IUPAC name of a molecule. Write its molecular formula.
user
C21H29N5O4
assistant