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Name the molecular formula for the molecule established as methyl (2R)-2-[(5E)-5-[[3-bromo-4-[(3,4-dichlorophenyl)methoxy]phenyl]methylidene]-2,4-dioxo-1,3-thiazolidin-3-yl]propanoate using the IUPAC nomenclature.
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C21H16BrCl2NO5S
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