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Characterization of Acylated Anthocyanins in Callus Induced From Storage Root of Purple-Fleshed Sweet Potato, Ipomoea batatas L

Author(s): Terahara N. | Konczak I. | Ono H. | Yoshimoto M. | Yamakawa O.

Journal: Journal of Biomedicine and Biotechnology
ISSN 1110-7243

Volume: 2004;
Issue: 5;
Start page: 279;
Date: 2004;
Original page

Four anthocyanins were isolated from a highly pigmented callus induced from the storage root of purple-fleshed sweet potato (Ipomoea batatas L) cultivar Ayamurasaki. The anthocyanins were respectively identified as cyanidin 3- O -(2- O -(6- O -( E )-caffeoyl- β -D-glucopyranosyl)- β -D-glucopyranoside)-5- O - β -D-glucopyranoside, cyanidin 3- O -(2- O -(6- O -( E )- p -coumaroyl- β -D-glucopyranosyl)-6- O -( E )-caffeoyl- β -D-glucopyranoside)-5- O - β -D-glucopyranoside, cyanidin 3- O -(2- O -(6- O -( E )- p -coumaroyl- β -D-glucopyranosyl)-6- O -( E )- p -coumaroyl- β -D-glucopyranoside)-5- O - β -D-glucopyranoside, and peonidin 3- O -(2- O -(6- O -( E )- p -coumaroyl- β -D-glucopyranosyl)-6- O -( E )- p -coumaroyl- β -D-glucopyranoside)-5- O - β -D-glucopyranoside by chemical and spectroscopic analyses. These anthocyanins were examined with respect to the stability in neutral aqueous solution as well as the radical scavenging activity against the 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical. These acylated anthocyanins exhibited both higher stability and higher DPPH radical scavenging activity than corresponding nonacylated cyanidin and peonidin 3- O -sophoroside-5- O -glucosides.
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