You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Under IUPAC nomenclature, a molecule named 2-[[[5-fluoro-2-methyl-4-[4-(2,2,2-trifluoroethyl)piperazin-1-yl]-2,3-dihydroindol-1-yl]amino]methylidene]-3-hydroxybutanedioate is given. What is its corresponding molecular formula?
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C20H22F4N4O5-2
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