1,3-Bis[2-hy­droxy-2-(6-meth­oxy-2,2-dimethyl-3a,5,6,6a-tetra­hydro-2H-furo[2,3-d][1,3]dioxol-5-yl)eth­yl]-2,3-dihydro-1H-1,3-benzodiazol-2-one

In the title benzimidazolone, C₂₇H₃₈N₂O₁₁, which has N-bound glycosidic units, all five-membered O-heterocyclic rings adopt envelope conformations [for the outer rings, the C atom with the dimethyl groups represents the flap atom]. The two glycosidic units are related by a non-crystallographic twofold rotation axis that passes through the carbonyl portion. In the mol­ecular structure, the hy­droxy groups are hydrogen-bond donors to the carbonyl O atom. Weak inter­molecular C—H...O hydrogen bonding is present in the crystal structure.

8-Hy­droxy-5-(hy­droxy­meth­yl)quinolin-1-ium chloride

The title compound, C₁₀H₁₀NO₂⁺·Cl⁻, contains a quinoline ring system which is essentially planar, with the largest deviation from the mean plane being 0.017 (1) Å. In the crystal, the ion pairs and their inversion-symmetry-related partners are linked by N—H...Cl and O—H...Cl hydrogen bonds to form tetramers which are further connected through O—H...O hydrogen bonds, building infinite one-dimensional chains parallel to the [010] direction.