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 4-[[4-chloro-2-[(1,3-dimethyl-2,4,6-trioxo-1,3-diazinan-5-ylidene)methyl]phenoxy]methyl]benzonitrile .
user
C21H16ClN3O4
assistant