Hierarchy classification:

1. top of the aat hierarchies
2. Materials Facet
3. Materials (hierarchy name)
4. materials (substances)
5. [materials by property]
6. acid

Anotations

Scope note:

Any of a class of sugar acids occuring in various polysaccharides and in urine with both an aldehyde and a carboxyl group. It is the product of a monosaccharide in which the terminal group has been oxidized.