<unk>  is a linear polysaccharide composed of randomly distributed ß-(1-4)-linked D-glucosamine (deacetylated unit) and N-acetyl-D-glucosamine (acetylated unit). It has a number of commercial and possible biomedical uses.
Chitosan
Starch
Carboxymethyl cellulose
Calcium alginate
Chondroitin sulfate
Cornstarch
Lecithin
Lanolin