A maltose analog (Glcα1-4Glc) in which the C1 anomeric hydroxyl is replaced by hydrogen, locking the reducing-end glucose as a non-reducing 1-deoxy sugar. Used as a non-reducing maltose mimic for studying α-glucosidase / maltase-glucoamylase activity, glucan-binding proteins, and as a substrate-analog inhibitor in glycosidase research.