You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name (5S)-4-[(4-chlorophenyl)-hydroxymethylidene]-5-(4-fluorophenyl)-1-[2-(1H-indol-3-yl)ethyl]pyrrolidine-2,3-dione into its molecular formula.
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C27H20ClFN2O3
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