obsolete cyanidin 3-O-glucoside 7-O-glucosyltransferase (hydroxybenzoly-glucose dependent) activity (obsolete GO:0102507)
OBSOLETE. Catalysis of the reaction: cyanidin 3-O-beta-D-glucoside betaine + 1-O-4-hydroxybenzoyl-beta-D-glucose = cyanidin 3,7-di-O-beta-D-glucoside betaine + 4-hydroxybenzoic acid + H+.