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Covalent anthocyanin–flavonol complexes from the violet-blue flowers of Allium ‘Blue Perfume’

Norio Saito, Maiko Nakamura,Koichi Shinoda,Naho Murata, Toshinari Kanazawa,Kazuhisa Kato,Kenjiro Toki,Hiroko Kasai,Toshio Honda,Fumi Tatsuzawa

Phytochemistry（2012）

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Abstract
Three covalent anthocyanin–flavonol complexes (pigments 1–3) were extracted from the violet-blue flower of Allium ‘Blue Perfume’ with 5% acetic acid-MeOH solution, in which pigment 1 was the dominant pigment. These three pigments are based on delphinidin 3-glucoside as their deacylanthocyanin and were acylated with malonyl kaempferol 3-sophoroside-7-glucosiduronic acid or malonyl-kaempferol 3-p-coumaroyl-tetraglycoside-7-glucosiduronic acid in addition to acylation with acetic acid.
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Key words
Allium ‘Blue Perfume’,Alliaceae,Delphinidin 3-glucoside kaempferol 3-glycoside-7-glucosiduronic acids and malonic acid,Anthocyanin and flavonols disubstitute malonate,Intramolecular copigmentation,Flower color
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