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NMR assignments and single‐crystal X‐ray diffraction analysis of deoxyloganic acid
Author(s) -
Teng Rong Wei,
Wang De Zu,
Wu Yun Shan,
Lu Yang,
Zheng Qi Tai,
Yang Chong Ren
Publication year - 2005
Publication title -
magnetic resonance in chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0749-1581
DOI - 10.1002/mrc.1502
Subject(s) - chemistry , benzoic acid , caffeic acid , single crystal , proton nmr , carbon 13 nmr , x ray , crystallography , diffraction , stereochemistry , ethanol , nmr spectra database , spectral line , organic chemistry , physics , quantum mechanics , astronomy , optics , antioxidant
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 1 H and 13 C NMR spectra of 1 in solvents CD 3 OD, D 2 O and CDCl 3 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. Copyright © 2004 John Wiley & Sons, Ltd.