出典:Wikipedia
出典:『Wikipedia』 (2011/04/12 13:57 UTC 版)
Echinacoside is a natural phenol. It is a caffeic acid glycoside from the phenylpropanoid class. It is constituted from a trisaccharide consisting of one glucose and two rhamnose moieties glycosidically linked to one caffeic acid and one dihydroxyphenylethanol residue at the centrally situated rhamnose. This water-soluble glycoside is a distinctive secondary metabolite of Echinacea angustifolia and Echinacea pallida (to about 1%) but only occurs in trace amounts in Echinacea purpurea. It is also isolated from Cistanche spp.