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The title compound, an octamer C8S8 of carbon sulfide, is obtained by reacting diethyl dihydroxythieno[2,3-b]thiophenedicarboxylate with the Lawesson reagent in the presence of sulfur. The crystal structure shows three-dimensional sulfur-sulfur interactions.doi:10.1515/znb-1993-1122 fatcat:uofmoaew6zagffxww2w6tb5m5e