Diacylated anthocyanins

Terahara, N. et al.. Six diacylated anthocyanins from the storage roots of purple sweet potato, Ipomoea batatas, Biosci. Biotechnol. Biochem., 63, 1420, 1999. 

Goto, T. et al., Strnctnre of platyconin, a diacylated anthocyanin isolated from the Chinese beU flower Platycodon grandflorum. Tetrahedron Lett., 24, 2181, 1983. 

Many recent stndies of NMR spectroscopy have been reported for structure elucidation of anthocyanins from many plant materials such as carrot, tart berries, boysenberries, " flowers, black soybeans, and anthocyanin and flavonol derivatives in red wine. Ginsti et al. (1998) structurally elucidated two novel diacylated anthocyanins and two monoacylated anthocyanins from radish Raphanus sativus) by one- and two-dimensional NMR. Anderson et al. (2006) applied two-dimensional NMR to characterize carboxypyranoanthocyanins. Two 3-deoxyantho-cyanins, lnteolinidin-5-glncoside, and apigeninidin-5-glucoside were identified by Swinny et al. nsing H and C NMR. 

Matsui, T., Ebuchi, S., Kobayashi, M., Fukui, K., Sugita, K., Terahara, N., and Matsumoto, K., Anti-hyperglycemic effect of diacylated anthocyanin derived from Ipomoea batatas cultivar Ayamurasaki can be achieved through the a-glucosidase inhibitory action, J. Agric. Food Chem., 50, 7244, 2002. 

Fukui, Y. et al.. Structures of two diacylated anthocyanins from Petunia hybrida cv. Surfinia Violet Mini, Phytochemistry, 47, 1409, 1998. 

Highly acylated anthocyanins may not respond to pH changes the same way as anthocyanins with no or few acylating groups, and may not decolor as much as nonacylated or mono-or diacylated anthocyanins do at pH 4.5. 

ID AKA E, YAMAKITA H, OGAWA T, KONDO T, YAMAMOTO M and GOTO T (1987), Stracture of three diacylated anthocyanins isolated from red cabbage, Brassica oleracea , Chem Lett, 1213-1216. 

NAKATANI N, IKEDA K, NAKAMURA M and KIKUZAKI, H (1987), StraCtUIC of diacylated anthocyanins from red cabbage (Brassica oleraced) Chem Express, 2, 555-8. 

Yoshida, K., Kondo, T. Goto, T. (1992). Intramolecular stacking conformation of gentiodelphin, a diacylated anthocyanin from Gentiana Makinoi. Tetrahedron, 48,4313—4326. 

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