ketohexose

1.Ketohexose A ketose SUGAR with six carbon atoms, e.g. fructose.

己糖：一种六碳的糖。例如果糖。

2.Glucose cyclizes to form asix- membered pyranose ring whilst five –carbon surgars and six-carbon ketose sugars (ketohexoses) such as fructnose rings.

环状结构 四碳糖和更大的糖环化，醛基或基与糖的另一碳原子上的羟基反应。