3β-Taraxerol from Bridelia micrantha

Isolation of the title compound, C₃₀H₅₀O, from Bridelia micrantha yielded suitable crystals for an X-ray structure determination, showing it to be in the β-form. The crystal packing is determined by infinite zigzag O—H...O hydrogen-bonded chains.

1,6-An­hydro-2-iodo-2-deoxy-β-D-gluco­pyran­ose (Iodo­levoglucosan)

The molecular structure of the title compound, C₆H₉IO₄, is similar to that of 1,6-an­hydro-β-D-gluco­pyran­ose. The crystal packing shows strong intermolecular O—H...O and C—H...I hydrogen bonds.

2′-Hydr­oxy-4,4′,5′,6′-tetra­methoxy­chalcone

In the crystal structure of the title compound, C₁₉H₂₀O₆, the dihedral angle between the two aromatic planes is 31.8 (1)°. Intermolecular C—H...O hydrogen bonds serve to stabilize the structure.