Figure 4. Haworth formula of selected monosaccharides (1 and 2) and disaccharides (3 and 4). (1: β-D-glucopyranose; 2: α-D-galactopyranose; 3: maltose; 4: sucrose. Hemiacetal-groups are marked)

From

The Iodine Test for Reducing Sugars – A Safe, Quick and Easy Alternative to Copper(II) and Silver(I) Based Reagents

Holger Fleischer

World Journal of Chemical Education. 2019, 7(2), 45-52 doi:10.12691/wjce-7-2-3