ACYLATED CYANIDIN 3,7,3'-TRIGLUCOSIDES WITH p-HYDROXYBENZOIC ACID FROM THE FLOWERS OF DENDROBIUM

摘要

Two new acylated anthocyanins were isolated from the purple flowers of Dendrobium X superbiens,along with four known pigments.These pigrnents were all based on cyanidin 3,7,3'-triglucoside,and acylated variously with malonic,sinapic,and p-hydroxybenzoic acids.One of new anthocyanins was fully determined to be cyanidin 3-O-[6-O-(malonyl)-beta-D-glucopyranoside]-7-O-[6-O-(p-hydroxybenzoyl)-beta-D-glucopyranoside]-3'-O-[6-O-(4-(beta-D-glucopyranosyl)-p-hydroxybenzoyl)-beta-D-glucopyranoside] by chemical and spectral methods.Another new pigment was provisionally determined to be cyanidin 3-malonylglucoside-7-glucosyl-p-hydroxybenzoylglucoside-3'-p-hydroxybenzoylglucoside.