. "In the presence of NADH and a reductase, 6'-deoxychalcone is produced." . . . "Chalcone synthase" . "Naringenin-chalcone synthase" . "6'-deoxychalcone synthase" . "Flavonone synthase" . "3 malonyl-CoA + 4-coumaroyl-CoA = 4 CoA + naringenin chalcone + 3 CO(2)." .