Reaction catalyzed by cyanidin 3-O-glucoside 7-O-glucosyltransferase (acyl-glucose) (2.4.1.300)

		+			=			+
	1-O-4-coumaroyl-beta-D-glucose	+		cyanidin 3-O-beta-D-glucoside	=		4-coumarate	+		cyanidin 3,7-di-O-beta-D-glucoside