title: The furan-osteroid viridiol.
abstract: The asymmetric unit of the title compound, C20H18O6 (systematic name: 1β,3β-dihy-droxy-2β-meth-oxyfuro[4',3',2':4,5,6]-18-norandrosta-8,11,13-triene-7,17-dione), a dihydro derivative of the fungal steroid viridin, contains two mol-ecules with similar conformations. The rings bearing the hy-droxy groups adopt boat conformations. The absolute structure was assigned based on the known chirality of a precursor compound. In the crystal, mol-ecules are linked by O-H⋯O hydrogen bonds, generating a three-dimensional network and weak C-H⋯O inter-actions consolidate the packing.
authors: Department of Chemistry, Uppsala BioCenter, P.O. Box 7015, Swedish University of Agricultural Sciences, SE-750 07 Uppsala, Sweden.
authors: Pierre F
authors: PF
authors: Andersson
authors: Anders
authors: A
authors: Broberg
authors: Daniel
authors: D
authors: Lundberg
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