
From the ethyl acetate soluble fraction of a methanol/water extract of the herb Eupatorium perfoliatum L. (Asteraceae) six caffeic acid derivatives have been isolated and identified by 1D- and 2D-NMR spectroscopic data. Besides the common quinic acid derivatives 5-caffeoylquinic acid (chlorogenic acid), 3-caffeoylquinic acid (neochlorogenic acid) and 3,5-dicaffeoylquinic acid, three up to now unknown depsides of caffeic acid with glucaric acid have been isolated: 2,5-dicaffeoylglucaric acid, 3,4-dicaffeoylglucaric acid, and 2,4- or 3,5-dicaffeoylglucaric acid.
Flavonoids, Magnetic Resonance Spectroscopy, Molecular Structure, Eupatorium perfoliatum L.; Asteraceae; Flavonoids; Dicaffeoylglucaric acid; NMR, Eupatorium, Quinic Acid, Organic chemistry, Asteraceae, NMR, Article, Eupatorium perfoliatum L., QD241-441, Caffeic Acids, Chlorogenic Acid, Dicaffeoylglucaric acid
Flavonoids, Magnetic Resonance Spectroscopy, Molecular Structure, Eupatorium perfoliatum L.; Asteraceae; Flavonoids; Dicaffeoylglucaric acid; NMR, Eupatorium, Quinic Acid, Organic chemistry, Asteraceae, NMR, Article, Eupatorium perfoliatum L., QD241-441, Caffeic Acids, Chlorogenic Acid, Dicaffeoylglucaric acid
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