- Anthocyanins from flowers of Cichorium intybus
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From the blue perianth segments of Cichorium intybus we isolated four anthocyanins. The pigments were identified as delphinidin 3,5-di-O-(6-O-malonyl-β-D-glucoside) and delphinidin 3-O-(6-O-malonyl-β-D-glucoside)-5-O-β-D-glucoside and the known compounds
- Noerbaek, Rikke,Nielsen, Karina,Kondo, Tadao
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- Triacylated anthocyanidin 3-arabinosylglucoside-7,3'-diglucosides isolated from the bluish flowers of Tradescantia virginiana cultivars and their distribution in the Tradescantieae
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Two triacylated anthocyanidin 3-arabinosylglucoside-7,3'-diglucosides were isolated from the purple-violet-violet-blue flowers of Tradescantia virginiana cultivars. The structures were determined to be 3-O-[6-O-(2-O-(trans-caffeoyl)- α-arabinofuranosyl)-β-glucopyranoside]-7,3'-O-di-[6-O-(trans- caffeoyl)-β-glucopyranoside]s of delphinidin and cyanidin. The former is a new anthocyanin in plants, whereas the latter, a rare anthocyanin has been recognized to be present in Zebrina pendula. Both anthocyanins exhibited typical three λmax in the visible region at 537, 574 and 620 nm for the delphinidin glycoside and at 510, 545 and 580 nm for the cyanidin glycoside in a 5.6 pH solution. These spectroscopic characteristics might be responsible for forming the intramolecular co-pigmentation between anthocyanidin and caffeic acid residues in these pigments. By HPLC analysis of nine species of the tribe Tradescantieae it was revealed that polyacylated anthocyanidin 3-arabinosylglucoside-7,3'-diglucosides were commonly found in all these plants as their major anthocyanins. The Japan Institute of Heterocyclic Chemistry.
- Tatsuzawa, Fumi,Saito, Norio,Maeyama, Kazushi,Yokoi, Masato,Shigihara, Atsushi,Honda, Toshio
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experimental part
p. 2257 - 2267
(2011/04/12)
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- New oligomeric proanthocyanidine from Ziziphus jujuba
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Chemical and spectral data establish the structure of an oligomeric proanthocyanidine PZ-5 isolated from Ziziphus jujuba.
- Malik, Aibek,Kuliev,Akhmedov,Vdovin,Abdullaev
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- Acylated anthocyanins from the blue-violet flowers of Anemone coronaria
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Five polyacylated anthocyanins were isolated from blue-violet flowers of Anemone coronaria 'St. Brigid'. They were identified as delphinidin 3-O-[2-O-(2-O-(trans-caffeoyl)-β-D-glucopyranosyl)-6-O- (malonyl)-β-D-galactopyranoside]-7-O-[6-O- (trans-caffeoyl
- Saito, Norio,Toki, Kenjiro,Moriyama, Hidekazu,Shigihara, Atsushi,Honda, Toshio
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p. 365 - 373
(2007/10/03)
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- Acid mediated hydrolysis of blueberry anthocyanins
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Acid mediated hydrolysis of anthocyanins was studied using capillary zone electrophoresis (CZE). A commercially available wild blueberry (Bilberry) extract was dissolved in different concentrations of TFA (0.1, 1, 3, 9%), then was subjected to thermodecom
- Ichiyanagi,Oikawa,Tateyama,Konishi
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p. 114 - 117
(2007/10/03)
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