An acylated cyanidin 3-rutinoside-7-glucoside with p-hydroxybenzoic acid from the red-purple flowers of Campanula medium

A new acylated anthocyanin was isolated from the red-purple flowers of Campanula medium as a major pigment together with a known anthocyanin. The new pigment was determined to be cyanidin 3-O-[6-O-(alpha-L-rhamnopyranosyl)-beta-D-glucopyranosyl]-7-O-{4-[6-O-(4-(6-O(p-hydroxybenzoyl)-beta-D-glucopyranosyl)-oxybenzoyl)-beta-D-glucopyranosyloxybenzoyl]-beta-D-glucopyranoside} based on spectroscopic analyses. The known pigment was also identified to be rubrocampanin, pelargonidin 3-rutinoside-7(p-hydroxybenzoylglucopyranosyl-p-hydroxybenzoylglucopyranosyl-p-hydroxy-benzoylglucopyranoside).