The Crystal and Molecular Structures of Hancokinol and Hancolupenone from Cynanchum hancokianum (MAXIM.) AL. ILJINSKI. (Asclepiadaceae)

The crystal and molecular structures of hancokinol and hancolupenone from Cynanchum hancokianum have been determined by X-ray analysis. In the case of hancokinol, among four molecules related on a 4-fold rotation axis, hydrogen bondings between the hydroxyl groups of neighboring molecules are observed.