Reaction catalyzed by cyclomaltodextrin glucanotransferase (2.4.1.19)

		+			=			+
	alpha-cyclodextrin	+		isoascorbic acid	=		L-isoascorbic acid-2-O-alpha-D-glucoside	+		L-isoascorbic acid-2-O-alpha-D-oligoglucoside