You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[4-(diethylamino)phenyl]-3-(2,3-dihydroindol-1-yl)-4-(4-fluorophenyl)pyrrole-2,5-dione The above is the IUPAC name of a molecule. Write its molecular formula.
user
C28H26FN3O2
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