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system
Provide the molecular formula for the IUPAC named substance 4-[(5Z)-5-[(3,5-dibromo-2-hydroxyphenyl)methylidene]-4-oxo-2-sulfanylidene-1,3-thiazolidin-3-yl]-N-(4-ethoxyphenyl)butanamide .
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C22H20Br2N2O4S2
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