title: Acylated flavone C-glycosides from Hemistepta lyrata.
abstract: Two new acylated flavone C-glycosides, 6''-O-(2'''-methylbutyryl)isoswertisin (1) and 6''-O-(2'''-methylbutyryl)isoswertiajaponin (2), together with four known acylated flavone C-glycosides, were isolated for the first time from the whole plants of Hemistepta lyrata (Compositae). Their structures were elucidated on the basis of chemical and spectroscopic methods including HR-ESI-MS, ESI-MS, UV, IR, and 1D and 2D NMR spectral techniques.
authors.affiliation: Institute of Phytochemistry, Jilin Academy of Chinese Medicine Sciences, Changchun, China.
authors.forename: Fang-Yan
authors.initials: FY
authors.lastname: Dong
authors.forename: Li-Na
authors.initials: LN
authors.lastname: Guan
authors.forename: Ying-Hua
authors.initials: YH
authors.lastname: Zhang
authors.forename: Zheng-Hua
authors.initials: ZH
authors.lastname: Cui
authors.forename: Li
authors.initials: L
authors.lastname: Wang
authors.forename: Wei
authors.initials: W
authors.lastname: Wang
mesh_terms: D019659:Asteraceae / Q000737:chemistry*; D004365:Drugs, Chinese Herbal / Q000737:chemistry / Q000302:isolation & purification*; D047309:Flavones / Q000737:chemistry / Q000302:isolation & purification*; D006027:Glycosides / Q000737:chemistry / Q000302:isolation & purification*; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular
chemical_list: C552783:6''-O-(2'''-methylbutyryl)isoswertiajaponin; C552784:6''-O-(2'''-methylbutyryl)isoswertisin; D004365:Drugs, Chinese Herbal; D047309:Flavones; D006027:Glycosides