Carbohydrate derivatives are compounds that are chemically modified forms of carbohydrates. These modifications can include the addition of functional groups, such as amino or phosphate groups, which can change the properties and functions of the original carbohydrate. Common examples include amino sugars, which are important in biological processes, and nucleotides, which play a crucial role in DNA and RNA. These derivatives are essential in various biological functions and applications. For instance, glycosaminoglycans are carbohydrate derivatives that provide structural support in connective tissues. Additionally, carbohydrate derivatives are used in pharmaceuticals and food industries, enhancing flavor, texture, and nutritional value.