7-Hydroxy-6-methoxy-3-[(2-oxo-2H-1-benzopyran-7-yl)oxy]-2H-1-benzopyran-2-one.
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.
Zhang
Tian-Zhu
TZ
Institute of Grassland Science, Northeast Normal University, and Key Laboratory of Vegetation Ecology, Ministry of Education, Changchun 130024, People's Republic of China.
Wei
Chun-Yan
CY
Xu
Guo-Hai
GH
Park
Se-Won
SW
D003374:Coumarins / Q000737:chemistry*; D003461:Crystallography; D006860:Hydrogen Bonding; D008958:Models, Molecular; D015394:Molecular Structure; D018515:Plant Leaves / Q000737:chemistry
D003374:Coumarins; C035316:daphnoretin