 Like first-generation Glycoazodyes, second-generation Glycoazodyes use glucose, galactose or lactose as the sugar group.Like first-generation Glycoazodyes, second-generation Glycoazodyes are synthesized using a glucose, galactose, or lactose sugar group.The point of the ether bond is controlled by selectively protecting alcohol groups on the sugar, or by choosing an azo dye with a different alcohol group position.