You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4,7-dimethyl-3-[3-oxo-3-[2-(1H-pyrrol-2-yl)pyrrolidin-1-yl]propyl]chromen-2-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C22H24N2O3
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