Reaction catalyzed by anthocyanin 5-O-glucoside 6'''-O-malonyltransferase (2.3.1.172)

		+			=		CoA	+
	malonyl-CoA	+		cyanidin 3-O-[[2-O-beta-D-xylosyl]-6-O-(6-O-(4-coumaroyl)-beta-D-glucoside)] 5-O-beta-D-glucoside	=		CoA	+		cyanidin 3-O-[[2-O-beta-D-xylosyl]-6-O-(6-O-(4-coumaroyl)-beta-D-glucoside)] 5-O-(6-O-malonyl)-beta-D-glucoside