Abstract
A new coumarin, edgeworic acid (1), was isolated from the flower buds of Edgeworthia chrysantha, together with the five known coumarins umbelliferone (2), 5,7-dimethoxycoumarin (3), daphnoretin (4), edgeworoside C (5), and edgeworoside A (6). Their structures were established on the basis of spectral data, particularly by the use of 1D NMR and several 2D shift-correlated NMR pulse sequences (1H-1H COSY, HSQC and HMBC), in combination with acetylation reactions.
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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Acetylation
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Coumarins / chemistry*
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Coumarins / isolation & purification
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Flowers / chemistry*
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Magnetic Resonance Spectroscopy
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Molecular Structure
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Monosaccharides / chemistry
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Monosaccharides / isolation & purification
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Plant Roots / chemistry
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Thymelaeaceae / chemistry*
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Umbelliferones / chemistry
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Umbelliferones / isolation & purification
Substances
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Coumarins
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Monosaccharides
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Umbelliferones
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edgeworoside A
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edgeworoside C
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daphnoretin
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7-hydroxycoumarin