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The structure of echinacoside, isolated from Echinacea angustifolia D.C. (Asteraceae) roots has been determided by 1H-NMR-and 13C-NMR-spectra to be β-(3′,4′-dihydroxyphenyl)-ethyl-O-α-ʟ-rhamnopyranosyl (1 → 3)-O-β-ᴅ-[β-ᴅ-glucopyranosyl (1 → 6)]-(4-O-caffeoyl)-glucopyranoside (cf. Fig. 1).
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Becker et al. (1982) studied this question.
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