You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-(2-methoxyphenyl)-1-[4-(2-pyrrolidin-1-ylethyl)-2,3-dihydroquinoxalin-1-yl]propan-1-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C24H31N3O2
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