Crystal structure of 4,6-dimethyl-2-[(2,3,4,6-tetra-O-acetyl-β-d-galacto-pyranos-yl)sulfan-yl]pyrimidine.

In the title com-pound, C(20)H(26)N(2)O(9)S, the S atom is attached equatorially to the sugar ring. The C-S bond lengths are unequal, with S-C(s) = 1.8018†(13)†à and S-C(p) = 1.7662†(13)†à (s = sugar and p = pyrimid-yl). In the crystal, a system of three weak hydrogen bonds, sharing an oxygen acceptor, links the mol-ecules to form chains propagating parallel to the b-axis direction.