| 摘要 |
A chitin oligosaccharide which is a chitin oligomer having 2,5-anhydromannose group or a chitosan oligosaccharide which is a chitosan oligomer having 2,5-anhydromannose group a structure of the formula shown below at a terminal end: <CHEM> wherein it can be prepared by allowing chitin or chitosan to react with nitrous acid at a temperature of 10 DEG C or lower in an aqueous solution with a hydrogen ion concentration of 1 to 6 to effect deamination reaction and pinacol rearrangement reaction, and further reducing this with a reducing agent, a chitin oligosaccharide which is a chitin oligomer having 2,5-anhydromannitol group or a chitosan oligosaccharide which is a chitosan oligomer having 2,5-anhydromannitol group having a structure of the formula shown below at an end: <CHEM> d
|
