title: Chukfuransins A-D, four new phragmalin limonoids with β-furan ring involved in skeleton reconstruction from Chukrasia tabularis.
abstract: Four new phragmalin limonoids (chukfuransins A-D) were isolated from the twigs and leaves of Chukrasia tabularis. Chukfuransins A (1) and B (2) feature a unique C-15/C-20 linkage proposed to be built by a biogenetic pathway involving Michael addition. Chukfuransins C (3) and D (4) feature the C-15/C-21 linkage. Their structures and absolute configurations were established by NMR techniques and X-ray crystallographic analysis.
authors.affiliation: State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650204, PR China.
authors.forename: Kun
authors.initials: K
authors.lastname: Hu
authors.forename: Jie-Qing
authors.initials: JQ
authors.lastname: Liu
authors.forename: Xiao-nian
authors.initials: XN
authors.lastname: Li
authors.forename: Jian-Chao
authors.initials: JC
authors.lastname: Chen
authors.forename: Wei-Ming
authors.initials: WM
authors.lastname: Zhang
authors.forename: Yan
authors.initials: Y
authors.lastname: Li
authors.forename: Liang-qun
authors.initials: LQ
authors.lastname: Li
authors.forename: Lin-lin
authors.initials: LL
authors.lastname: Guo
authors.forename: Wei-guang
authors.initials: WG
authors.lastname: Ma
authors.forename: Ming-Hua
authors.initials: MH
authors.lastname: Qiu
mesh_terms: D018360:Crystallography, X-Ray; D005663:Furans / Q000737:chemistry* / Q000302:isolation & purification*; D036701:Limonins / Q000032:analysis / Q000737:chemistry* / Q000302:isolation & purification*; D009682:Magnetic Resonance Spectroscopy; D029582:Meliaceae / Q000737:chemistry*; D015394:Molecular Structure; D024301:Plant Bark / Q000737:chemistry*; D018547:Plant Stems / Q000737:chemistry*
chemical_list: D005663:Furans; D036701:Limonins; C039281:furan