5 ACYLATED PELARGONIDIN GLUCOSIDES IN THE RED FLOWERS OF HYACINTHUS-ORIENTALIS

Two novel anthocyanins, pelargonidin 3-O-(6-O-trans-p-coumaroyl-beta-D-glucoside)-5-O-(6-O-acetyl-beta-D-glucoside) and pelargonidin 3-O-(6-O-feruloyl-beta-D-glucoside)-5-O-(6-O-malonylglucoside), have been isolated from the red flowers of Hyacinthus orientalis cv Holly Hock. Three known acylated anthocyanins, pelargonidin 3-O-(6-O-caffeoyl-beta-D-glucoside)-5-O-beta-D-glucoside, pelargonidin 3-O-(6-O-feruloyl-beta-D-glucoside)-5-O-beta-D-glucoside and pelargonidin 3-O-(6-O-caffeoyl-beta-D-glucoside)-5-O-(6-O-malonyl-beta-D-glucoside), were also obtained. Their complete structures were unambiguously elucidated principally by 1D and 2D NMR techniques.