Judging and coding of D,L configuration of open chain form structure,D,L configuration of straight chain form and Haworth formular of oxido-cyclic form structure of monosaccharide which is the basic unit of sugar are explained.
糖类结构的基本单元是单糖,介绍了单糖开链结构的D,L构型、氧环式结构的直链型D,L构型、氧环式结构的哈武斯式D,L构型的判断和标记方法。