You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 5-fluoro-3-[5-(3-morpholin-4-ylpropyl)-3H-2-benzofuran-1-ylidene]-1H-indol-2-one by IUPAC nomenclature, provide its molecular formula.
user
C23H23FN2O3
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