2,3,4,6-Tetra-O-acetyl-1-[(dimethylcarbamothioyl)sulfanyl]-β-d-galacto-pyran-ose.

In the structure of the title compound, C(17)H(25)NO(9)S(2), the bond lengths in the C-S-C moiety are almost equal at 1.7959†(8) and 1.7877†(9)†à , with a shorter formally double C-S bond of 1.6698†(9)†à at the other sulfur atom. The eight-atom sequence O3-C3-C2-C1-S-C-N-C (using standard sugar numbering) shows an extended conformation. The packing involves 'weak' hydrogen bonds, whereby the three shortest C-H⋯O contacts combine to form layers of mol-ecules parallel to the ab plane.