ACYLATED CYANIDIN GLYCOSIDES IN THE ORANGE-RED FLOWERS OF SOPHRONITIS-COCCINEA

Five acylated anthocyanins were isolated from the orange-red flowers o f Sophronitis coccinea. Their structures were based on cyanidin 3,3',7 -triglucoside, acylated variously with malonic, p-coumaric, caffeic an d ferulic acids. Three anthocyanins were fully determined to be cyanid in -[6-O-(malonyl)-beta-D-glucopyranoside]-3'-O-[beta oside]-7-O-(tran s-cafeoyl)-beta-D-glycopyranoside] and its demalonyl derivative, and c yanidin 7-O-[6-O-(trans-feruloyl)-beta-D-glucopyranoside]. Two other p igments were partly characterized as p-coumaroyl cyanidin 3-malonylglu coside-7,3'-diglucoside and feruloyl cyanidin 3,7,3'-triglucoside, (C) 1998 Elsevier Science Ltd. All rights reserved.