Reaction catalyzed by anthocyanin 6''-O-malonyltransferase (2.3.1.171)

		+			=		CoA	+
	methylmalonyl-CoA	+		cyanidin 3-O-beta-D-glucoside	=		CoA	+		cyanidin 3-O-(6-O-methylmalonyl-beta-D-glucoside)