You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-(2,3-dihydro-1,4-benzoxazine-4-carbonyl)-1-(2,3-dihydro-1H-inden-5-yl)pyrrolidin-2-one is the IUPAC name of a molecule. Please give its molecular formula.
user
C22H22N2O3
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