Intramolecular stabilization of acylated betacyanins
摘要:
Racemization and stability of the betacyanins, betanin (betanidin 5-O-glucoside) and amaranthin (betanidin 5-O-glucuronosylglucoside), under acidic conditions were compared with those of the corresponding feruloyl derivatives, lampranthin II and celosianin II. Both acylbetacyanins showed a reduced racemization velocity and celosianin II in addition an enhanced stability, possibly caused by intramolecular association between the betanidin and the feruloyl moieties. (C) 1998 Elsevier Science Ltd. All rights reserved.