title: Three new phenolic compounds from the roots of Glycyrrhiza yunnanensis.
abstract: Three new phenolic compounds (1-3), together with 16 known compounds (4-19), were isolated from the roots of Glycyrrhiza yunnanensis Cheng f. et L. K. Dai. On the basis of 1D and 2D NMR, HR-ESI-MS, and circular dichroism (CD) spectroscopic analysis, structures of the new compounds were elucidated as 2-(2'-methoxy-4'-hydroxy)-aryl-3-methy-6-hydroxy-benzofuran (1), (2S)-6,7-(2,2-dimethyldihydropyrano)-8-prenyl-4'-hydroxyflavanone (2), and 6-prenyl-7,3',4'-trihydroxyflavone (3). Compounds 1, 3, 5, 12, 14, 15 and 16 showed antioxidant activity by an ABTS-based assay.
authors.affiliation: State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing 100191, China.
authors.forename: Qing
authors.initials: Q
authors.lastname: Wang
authors.forename: Shuai
authors.initials: S
authors.lastname: Ji
authors.forename: Si-wang
authors.initials: SW
authors.lastname: Yu
authors.forename: Hui-xia
authors.initials: HX
authors.lastname: Wang
authors.forename: Xiong-hao
authors.initials: XH
authors.lastname: Lin
authors.forename: Tao-tao
authors.initials: TT
authors.lastname: Ma
authors.forename: Xue
authors.initials: X
authors.lastname: Qiao
authors.forename: Cheng
authors.initials: C
authors.lastname: Xiang
authors.forename: Min
authors.initials: M
authors.lastname: Ye
authors.forename: De-an
authors.initials: DA
authors.lastname: Guo
mesh_terms: D000975:Antioxidants / Q000302:isolation & purification*; D006035:Glycyrrhiza / Q000737:chemistry*; D015394:Molecular Structure; D010636:Phenols / Q000302:isolation & purification*; D018517:Plant Roots / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry
chemical_list: D000975:Antioxidants; D010636:Phenols