Acta Cryst. (2002). E58, o402-o404  [ doi:10.1107/S1600536802004403 ]

The diacetate of (+)-pinoresinol

V. Langer, K. Lundquist and R. Stomberg

Abstract: The crystal structure of a monoclinic form of the diacetate of (+)-pinoresinol, the diacetate of 4,4'-[(1S,3aR,4S,6aR)-tetrahydro-1H,3H-furo[3,4-c]furan-1,4-diyl]bis[2-methoxyphenol], C₂₄H₂₆O₈, has been determined. Attempts to determine the crystal structure of a triclinic form of this compound did not give satisfactory results. One of the five-membered rings in the central dioxabicyclooctane ring system adopts an envelope conformation, with a bridge C atom as `flap'. The other five-membered ring is twisted on the benzylic C atom and the adjacent bridge C atom.

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