Wiktionary
galactosamine
n. (label en chemistry) an amino derivative of the sugar galactose; found in glycolipids and in mucopolysaccharides
Wikipedia
Galactosamine
Galactosamine is a hexosamine derived from galactose with the molecular formula CHNO. This amino sugar is a constituent of some glycoprotein hormones such as follicle-stimulating hormone (FSH) and luteinizing hormone (LH). Other sugar constituents of FSH and LH include glucosamine, galactose and glucose.
Galactosamine is a hepatotoxic, or liver-damaging, agent that is sometimes used in animal models of liver failure.