3-(Benzo[b]thien-2-yl)-5,6-dihydro-1,4,2-oxathiazine 4-Oxide

The title compound, C₁₁H₉NO₂S₂, is a potent material preservative and contains the 1,4,2-oxathiazine ring system in a half-chair conformation with the methylene C atoms 0.510 (3) and -0.367 (3) Å from the plane of the other four oxathiazine ring atoms.

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