title: NMR assignments and single-crystal X-ray diffraction analysis of deoxyloganic acid.
abstract: 7-Deoxyloganic acid (1), citrusin C (2), 3,4-dihydroxyl benzoic acid (3) and (E)-caffeic acid (4) were isolated from the water-soluble fraction of ethanol extracts of Morina nepalensis var. alba Hand.-Mazz. and their structures were determined on the basis of spectroscopic evidence. The total assignments of 1H and 13C NMR spectra of 1 in solvents CD3OD, D2O and CDCl3 were reported, in addition to the single-crystal X-ray diffraction analysis of its tetraacetate 1a. All compounds were obtained from Morina genus for the first time.
authors.affiliation: Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, Yunnan 650204, P. R. China. tengrongwei@hotmail.com
authors.forename: Rong Wei
authors.initials: RW
authors.lastname: Teng
authors.forename: De Zu
authors.initials: DZ
authors.lastname: Wang
authors.forename: Yun Shan
authors.initials: YS
authors.lastname: Wu
authors.forename: Yang
authors.initials: Y
authors.lastname: Lu
authors.forename: Qi Tai
authors.initials: QT
authors.lastname: Zheng
authors.forename: Chong Ren
authors.initials: CR
authors.lastname: Yang
mesh_terms: D039823:Iridoids / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy / Q000379:methods; D008958:Models, Molecular; D008968:Molecular Conformation; D014961:X-Ray Diffraction / Q000379:methods
chemical_list: C432876:7-deoxyloganic acid; D039823:Iridoids