A new flavonoid glycoside from leaves of Eucalyptus robusta
Guan, X.-f.; Guo, Q.-y.; Huang, X.-j.; Wang, Y.; Ye, W.-c.
Zhongguo Zhong Yao Za Zhi 40(24): 4868-4872
2015
ISSN/ISBN: 1001-5302 PMID: 27245036 Document Number: 683974
A new flavonoid glycoside, (-)-2S-8-methyl-5,7,4'-trihydroxyflavanone-7-O-β-D-glucopyranoside (1), along with five known ones, quercetin-3-O-(2"-galloyl)-α-L-arabinoside (2), kaempferol-3-O-α-L-arabinoside (3), guaijaverin (4), trifolin (5) and hyperin (6), was isolated from the leaves of Eucalyptus robusta. Their structures with absolute configurations were elucidated by NMR, HR-ESI-MS, CD spectra data and physicochemical methods. In addition, 2-6 were isolated from E. robusta for the first time.