Tannins and related polyphenols of euphorbiaceous plants. XI. Three new hydrolyzable tannins and a polyphenol glucoside from Euphorbia humifusa.
Three new hydrolyzable tannins, euphormisins M1, M2, and M3, were isolated from Euphorbia humifusa WILLD., and respectively characterized as 1,3,6-tri-O-galloyl-4-O- brevifolincarboxyl-beta-D-glucose (19), an oxidative metabolite (23) of geraniin, and 1,3,6-tri-O-galloyl-alpha-D-glucose (18), by spectroscopic and chemical methods. A new ellagic acid glucoside (16) and fifteen known tannins, including geraniin (8) and four dimers [euphorbins A (13), B (14), excoecarianin (15) and eumaculin A (12)], were also isolated.
Faculty of Pharmaceutical Sciences, Okayama University, Japan.
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Yoshida
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Amakura
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Liu
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Okuda
D005419:Flavonoids; D005960:Glucosides / Q000737:chemistry* / Q000302:isolation & purification; D006868:Hydrolysis; D009682:Magnetic Resonance Spectroscopy; D010636:Phenols / Q000737:chemistry* / Q000302:isolation & purification; D010936:Plant Extracts / Q000737:chemistry* / Q000302:isolation & purification; D010946:Plants, Medicinal / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry* / Q000302:isolation & purification; D059808:Polyphenols; D013634:Tannins / Q000737:chemistry* / Q000302:isolation & purification
D005419:Flavonoids; D005960:Glucosides; D010636:Phenols; D010936:Plant Extracts; D011108:Polymers; D059808:Polyphenols; D013634:Tannins