ACYLATED CYANIDIN 3-SAMBUBIOSIDE-5-GLUCOSIDES IN MATTHIOLA-INCANA

Four acylated cyanidin 3-sambubioside-5-glucosides were isolated from purple-violet flowers of Matthiola incana and their structures were de termined by chemical and spectroscopic methods. Three acylated anthocy anins were cyanidin osides)-5-O-(6-O-malonyl-beta-D-glucopyranosides), in which the acyl group is p-coumaryl, caffeyl or ferulyl, respective ly. The remaining pigment is free from malonic acid and was identified as cyanidin a-D-glucopyranoside)-5-O-(beta-D-glucopyranoside). Analys is of the anthocyanin constituents in 16 purple-violet cultivars revea led that they contained the above triacylated anthocyanins in variable amounts as main pigments. An aromatic pair of pigments containing sin apic and ferulic acids are considered to produce an important intramol ecular effect, making bluish colours in these flowers.