NMR characterization of novel pyranoanthocyanins derived from the pulp of Panax quinquefolius L. (North American ginseng).

Nabuurs, M.H., McCallum, J.L., Brown, D.C.W., and Kirby, C.W. (2015). "NMR characterization of novel pyranoanthocyanins derived from the pulp of Panax quinquefolius L. (North American ginseng).", Magnetic Resonance in Chemistry. doi : 10.1002/mrc.4366  Access to full text

Abstract

Three major pigments (one natural and two derived) were determined to be present in the berry pulp of Panax quinquefolius L. (North American ginseng). The first was a simple anthocyanin (pelargonidin 3-O-lathyroside) along with two novel pyranoanthocyanins, structurally similar to those recently discovered in Staghorn sumac. The three anthocyanins were structurally characterized using NMR (1H, gCOSY, gHSQC, gHMBC, TOCSY, ROESY, and 13C DEPTq135) and High Resolution MS. All three anthocyanins had the disaccharide lathyrose (2-O-(β-D-xylopyranosyl)-β-D-galactopyranoside) attached at the 3-O position. In the tradition of naming novel anthocyanin aglycones based on botanical origin, the new pyranoanthocyanin aglycones have been given the common names Panaxidin A (pelaragonidin-4-vinylcatechol) and Panaxidin B (pelargonidin-4-vinylphenol).

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