NMR assignments and single-crystal X-ray diffraction analysis of deoxyloganic acid.
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.
Teng
Rong Wei
RW
Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, Yunnan 650204, P. R. China. tengrongwei@hotmail.com
Wang
De Zu
DZ
Wu
Yun Shan
YS
Lu
Yang
Y
Zheng
Qi Tai
QT
Yang
Chong Ren
CR
D039823:Iridoids / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy / Q000379:methods; D008958:Models, Molecular; D008968:Molecular Conformation; D014961:X-Ray Diffraction / Q000379:methods
C432876:7-deoxyloganic acid; D039823:Iridoids