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 N-[[4-(dimethylamino)phenyl]methyl]-9-oxo-2,3-dihydro-1H-pyrrolo[2,1-b]quinazoline-6-carboxamide .
user
C21H22N4O2
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