7-Hydroxy-6-methoxy-3-[(2-oxo-2H-1-benzopyran-7-yl)oxy]-2H-1-benzopyran-2-one

Acta Crystallogr C. 2006 Feb;62(Pt 2):o86-8. doi: 10.1107/S0108270106000874. Epub 2006 Jan 21.

Abstract

The title compound, daphnoretin, C19H12O7, was isolated from the leaves of Stellera chamaejasme L. Two independent molecules are present in the asymmetric unit, with similar conformations. Each of the independent molecules is composed of two chromene systems connected by an ether bridge. The dihedral angles between the mean planes of the two chromene systems are 86.9 (2) and 81.9 (3) degrees. Molecules form chains via hydrogen bonds and adjacent chains are parallel to each other.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Coumarins / chemistry*
  • Crystallography
  • Hydrogen Bonding
  • Models, Molecular
  • Molecular Structure
  • Plant Leaves / chemistry

Substances

  • Coumarins
  • daphnoretin