obsolete cyanidin 3-O-glucoside 6''-O-malonyltransferase activity (obsolete GO:0102588)
OBSOLETE. Catalysis of the reaction: cyanidin 3-O-beta-D-glucoside betaine + malonyl-CoA = cyanidin 3-O-(6-O-malonyl-beta-D-glucoside) + coenzyme A.