1 322 [(5r)-5-(2,3-dibromo-5-ethoxy-4-hydroxybenzyl)-4-oxo-2-thioxo-1,3-thiazolidin-3-yl]acetic acid 1.000 2 4VZ (5~{z})-5-[(3-ethoxy-4-oxidanyl-phenyl)methylidene]-2-sulfanylidene-1,3-thiazolidin-4-one 0.750