Monosaccharides

Simple sugars or monosaccharides are a group of organic chemical compounds. They are the products of partial oxidation polyhydric alcohols. All monosaccharides have a chain of at least three carbon atoms as their backbone and have a [[carbonyl group] and at least one hydroxyl group. They are the building blocks of all carbohydrates and can combine to form double sugars (disaccharides), multiple sugars (oligosaccharides) or multiple sugars (polysaccharides).

https://de.wikipedia.org/wiki/Monosaccharid _{(Wikipedia CC-by-sa-3.0)}