The title compound (C15H21NO10)' Mr=375.34, crystallized in the orthorhombic space group P2121,21with a=8.989(1), b=9.350(2), c=22.839(2)Å, V=1919.4(7)Å3, Z=4 and Dc=1.299 Mgm−3. The structure was solved by direct methods and refined to an R-index of 0.043. The compound is in the α-D-configuration and displays the5C2conformation. The carbamoyl group is axially oriented and the remaining substituants are 3a, 4e, 5e and 6e. The absence of the anomeric effect in this C-glycoside results in equal and normal endocyclic C-O bond distances (1.425(3)Å). The carbamoyl nitrogen is involved in a bifurcated hydrogen bond, intramolecularly with the pyranosyl ring oxygen atom 0-6, and intermolecularly with the carbonyl oxygen atom 0-9.