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'-[3-(2-fluorophenyl)propanoyl]-9-oxo-2,3-dihydro-1H-pyrrolo[2,1-b]quinazoline-6-carbohydrazide .
user
C21H19FN4O3
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