You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[(1-benzyl-4-fluoropiperidin-4-yl)methyl]-7-fluoro-5,6-dimethoxy-2,3-dihydroinden-1-one is the IUPAC name of a molecule. Please give its molecular formula.
user
C24H27F2NO3
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