Aldoses Ketoses Oses: aldoses and ketoses Cyclising oses Linear D-hexoses → cyclic D-hexoses Cyclic D-hexoses → L-hexoses correspond to the following example: Names of cyclic oses (exercise) Haworth formulas of cyclic oses (exercise) Hexose oxidations Reduction of Oses Addition of HCN on aldoses and increase of the chain Chain reduction of oses using hydroxylamine Transformation of aldoses into ketoses via phenylhydrazine Processing ketoses to aldoses at controlled pH Diosides Dioses: cellobiose, lactose, saccharose Triosides, example: raffinose Tetrosides, example: stachyose Polyosides Polyoses: cellulose, amylose, amylopectine and glycogen Heterosides