You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(1R,2R,3aR)-1-(cyclopropanecarbonyl)-2-(4-fluorophenyl)-2,3a-dihydro-1H-pyrrolo[1,2-a]quinoline-3,3-dicarbonitrile is the IUPAC name of a molecule. Please give its molecular formula.
user
C24H18FN3O
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