#monosaccharide__monosaccharose__simple_sugar  a sugar (like sucrose or fructose) that does not hydrolyse to give other sugars; the simplest group of carbohydrates
  supertype:  #carbohydrate__saccharide__sugar  an essential structural component of living cells and source of energy for animals; includes simple sugars with small molecules as well as macromolecular substances; are classified according to the number of monosaccharide groups they contain
  subtype:  #triose  any monosaccharide sugar containing three atoms of carbon per molecule
  subtype:  #tetrose  any monosaccharide sugar containing four atoms of carbon per molecule
  subtype:  #pentose  any monosaccharide sugar containing five atoms of carbon per molecule
  subtype:  #hexose  a monosaccharide that contains six carbon atoms per molecule
     subtype:  #aldohexose  a monosaccharide sugar having six carbon atoms and an aldehyde group
        subtype:  #glucose  a monosaccharide sugar that has several forms; an important source of physiological energy
           subtype:  #corn_sugar.glucose__cornsugar  dextrose made by hydrolysis of cornstarch
           subtype:  #dextrose__dextroglucose__grapesugar  an isomer of glucose that is found in honey and sweet fruits
           subtype:  #blood_sugar__blood_glucose__bloodglucose  glucose in the bloodstream
     subtype:  #ketohexose  a monosaccharide having six carbon atoms and a ketone group
        subtype:  #fructose__fruit_sugar__fruitsugar__levulose__laevulose  a simple sugar found in honey and in many ripe fruits
  subtype:  #aldose  a monosaccharide sugar that contains the aldehyde group or is hemiacetal
     subtype:  #aldohexose  a monosaccharide sugar having six carbon atoms and an aldehyde group
  subtype:  #ketose  any monosaccharide sugar that contains a ketone group or its hemiacetal
     subtype:  #ketohexose  a monosaccharide having six carbon atoms and a ketone group

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