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β,β-Trehalose is a disaccharide composed of two α-glucose units. It is used in the synthesis of water-soluble bisphosphinite chiral ligands which can be used as asymmetrical hydrogenation catalysts for dehydroamino acids and their esters.

ChEBI: Beta,beta-trehalose is a trehalose in which both glucose residues have beta-configuration at the anomeric carbon. It is a trehalose and a beta-D-glucoside.