山梨糖（英语：Sorbose）在分类上属于己糖与酮糖，为D-果糖二号与三号位碳所对应的差向异构体。在工业生产维生素C的过程中，山梨糖作为发酵后产生的中间体。

果聚糖： 菊粉 · 果聚糖β2→6

甘露聚糖

半乳聚糖

Sorbose is a ketose belonging to the group of sugars known as monosaccharides. It has a sweetness that is equivalent to sucrose (table sugar). The commercial production of vitamin C (ascorbic acid) often begins with sorbose. L-Sorbose is the configuration of the naturally occurring sugar.