title: New kaurene diterpenoid glycosides from fenugreek seeds.
abstract: Two new kaurene diterpenoid glycosides, named Graecumoside A (1) and B (2), were isolated from fenugreek seeds, along with three known flavonoid-C-glycosides, isoorientin (3), isovitexin (4) and vitexin (5). By combined analyses of 1D- and 2D-NMR, and MS spectroscopy, the structures of two new compounds were elucidated as 3-O-β- D-glucopyranosyl kaur-5, 16-dien-3β, 6, 13β-trihydroxy-7-oxo-18-oic acid methyl ester and 3-O-β-neohesperidosyl kaur-5, 16-dien-3β, 6, 13β-trihydroxy-7-oxo-18-oic acid methyl ester, respectively. The kaurene diterpenoid glycosides were first isolated and identified from fenugreek seeds.
authors.affiliation: Department of Biotechnology, Beijing Institute of Radiation Medicine, Beijing 100850, China.
authors.forename: Xu
authors.initials: X
authors.lastname: Pang
authors.forename: Li-Ping
authors.initials: LP
authors.lastname: Kang
authors.forename: He-Shui
authors.initials: HS
authors.lastname: Yu
authors.forename: Yang
authors.initials: Y
authors.lastname: Zhao
authors.forename: Cheng-Qi
authors.initials: CQ
authors.lastname: Xiong
authors.forename: Jie
authors.initials: J
authors.lastname: Zhang
authors.forename: Bai-Ping
authors.initials: BP
authors.lastname: Ma
mesh_terms: D004224:Diterpenes / Q000737:chemistry*; D006027:Glycosides / Q000737:chemistry*; D015394:Molecular Structure; D012639:Seeds / Q000737:chemistry*; D029910:Trigonella / Q000737:chemistry*
chemical_list: D004224:Diterpenes; D006027:Glycosides