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The structure of(E)-N-[(E)-3-[(1R,2R)-2-(3,4-dibromo-phenyl)-1-fluro-cyclopropyl]-allylidene]-2-θ-tolyl-acetamide(C21H18ONFBr2,Mr=479.18)has been determined by X-ray singlecrystal diffraction and theoretical calculations to establish the configuration,ste