| abstract |
The invention relates to an annatto oligosaccharide which contains annatto tetrose with the mass of more than 40% of the total mass, wherein the annatto tetrose has the structural formula of alpha-D-Gal-(1-3)-alpha-D-Gal-(1-6)-alpha-D-Glc-(1-2)-beta-D-Fru. The preparation method of the annatto oligosaccharide and the annatto tetrose is simple in structure and high in product purity, has the activity of strengthening the immunity, adjusting intestinal flora and improving gastrointestinal tract functions, and is free from toxic side effect. |