Cynaroside | |
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2-(3,4-dihydroxyphenyl)-5-hydroxy-7-[(2S,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxychromen-4-one |
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Other names
Glucoluteolin |
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Identifiers | |
CAS number | 68321-11-9 |
PubChem | 5280637 |
Jmol-3D images | Image 1 |
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Properties | |
Molecular formula | C21H20O11 |
Molar mass | 448.37 g/mol |
Exact mass | 448.100561 |
Appearance | Yellow amorphous powder |
Melting point |
266–268 °C |
(verify) (what is: / ?) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) |
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Infobox references |
Cynaroside is a flavone, a flavonoid-like chemical compound. It is a 7-O-glucoside of luteolin and can be found in dandelion coffee, in Ferula varia and F. foetida[1] in Campanula persicifolia and C. rotundifolia[2], in the bamboo Phyllostachys nigra[3] and in Cynara scolymus (artichoke)[4].
Flavone 7-O-beta-glucosyltransferase adds a glucose to luteolin.
A cynaroside 7-O-glucosidase has been identified in the artichoke[4].
UV-Vis | |
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Lambda-max | UV : 348, 260 nm |
Extinction coefficient | (log ε): 4.11, 4.23 |
IR | |
Major absorption bands | ? cm−1 |
NMR | |
Proton NMR | 1H-NMR (500 MHz, CD3COCD3 + D2O): δ 3.42 (1H, t, J = 9.0 Hz, H-4′), 3.49 |
Carbon-13 NMR | 13C-NMR (125 MHz, CD3COCD3 + D2O): δ 61.7 (C-6″), 70.3 (C-4″), 73.8 (C-2″), |
Other NMR data | |
MS | |
Masses of main fragments |
ESI-MS [M+H]+ m/z 449.1 |
Reference[5]
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