Crystal structure of 4,6-dimethyl-2-{[3,4,5-trihy-droxy-6-(hy-droxy-meth-yl)tetra-hydro-2H-pyran-2-yl]sulfan-yl}nicotino-nitrile.

In the title compound, C(14)H(18)N(2)O(5)S, the C-S bond lengths are unequal, with S-C(glucose) = 1.8016†(15)†à and S-C(pyrid-yl) = 1.7723†(13)†à . The hydro-philic glucose residues lie in the regions z ≃ 0.25 and 0.75. Four classical hydrogen bonds link the mol-ecules to form layers parallel to the ab plane, from which the pyridyl rings project; pyridyl ring stacking parallel to the a axis links adjacent layers.