New dihydrochalcone glycosides from Lithocarpus litseifolius and the phenomenon of C-H-->C-D exchange observed in NMR spectra of phenolic components.
Two new dihydrochalcone glycosides named 6''-O-acetyltrilobatin (1) and 3''-O-acetylphloridzin (2) as well as four known compounds were isolated from the leaves of Lithocarpus litseifolius (Hance) Chun (family Fagaceae). Their structures were elucidated on the basis of spectroscopic analyses. The phenomena of C-H --> C-D exchange were observed in NMR spectra of the isolated phenolic components when measured in deuterated methanol.
Chen
Zhen-Hua
ZH
Shanghai Institute of Materia Medica, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, China.
Zhang
Ru-Jun
RJ
Wu
Jian
J
Zhao
Wei-Min
WM
D047188:Chalcones / Q000737:chemistry / Q000302:isolation & purification*; D004365:Drugs, Chinese Herbal / Q000737:chemistry / Q000302:isolation & purification*; D029962:Fagaceae / Q000737:chemistry*; D006027:Glycosides / Q000737:chemistry / Q000302:isolation & purification*; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D018515:Plant Leaves / Q000737:chemistry
C547886:3''-O-acetylphloridzin; C547885:6''-O-acetyltrilobatin; D047188:Chalcones; D004365:Drugs, Chinese Herbal; D006027:Glycosides; C015812:dihydrochalcone