 -Fructose is responsible for the sweet taste of many fruits, and is a building block of sucrose, the common sugar.The term "hexose" may sometimes be used to include the deoxyaldohexoses, which have one or more hydroxyls (–OH) replaced by hydrogen atoms (–H).It is named as the parent hexose, with the prefix ""m"-deoxi-", the "m" indicating the carbon with the affected hydroxyl.