You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 2-[(5Z)-5-[[6-fluoro-1-[(2-fluorophenyl)methyl]benzimidazol-2-yl]methylidene]-4-oxo-2-sulfanylidene-1,3-thiazolidin-3-yl]acetic acid into its molecular formula.
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C20H13F2N3O3S2
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