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(1R,2S,3S,4S)-(6-O-Acetyl-1,2-O-isoproplidene-3,5-dideoxy-α-D-glucofuranoso)-1,3,5-trihydro-2,3-oxathiaindene-2,2-dioxide(C11H16O8S,Mr=308.30) was synthesized and structurally characterized by NMR,MS and single-crystal X-ray diffraction.It belongs to the