Reaction catalyzed by flavonol-3-O-triglucoside O-coumaroyltransferase (2.3.1.173)
+
=
CoA
+
4-coumaroyl-CoA
+
a flavonol 3-O-[beta-D-glucosyl-(1->2)-beta-D-glucosyl-(1->2)-beta-D-glucoside]
=
CoA
+
a flavonol 3-O-[6-(4-coumaroyl)-beta-D-glucosyl-(1->2)-beta-D-glucosyl-(1->2)-beta-D-glucoside]