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Structures of verbascoside and orobanchoside,caffeic acid sugar esters from Orobanche rapum-genistae |
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| Authors: | C Andary R Wylde C Laffite G Privat F Winternitz |
| Institution: | 1. Ecole Nationale Supérieure de Chimie, 3400 Montpellier, France |
| Abstract: | The complete structural elucidation of the two caffeic acid sugar esters verbascoside and orobanchoside, has been realized by 1H and 13C NMR studies. It has been demonstrated that verbascoside is β-(3′,4′-dihydroxyphenyl)ethyl-O-α-L-rhamnopyranosyl(1→3)-β-D-(4-O-caffeoyl)-glucopyranoside, and orobanchoside is β-hydroxy-β-(3′,4′-dihydroxyphenyl)-ethyl-O-α-L-rhamnopyranosyl(1→2)-β-D-(4-O-caffeoyl)-glucopyranoside. |
| Keywords: | Orobanchaceae caffeic acid sugar esters 3 4-dihydroxyphenylethanol 3 4-dihydroxyphenylglycol glucose rhamnose verbascoside orobanchoside |
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