Well, by creating the glycosides, we essentially remove the hydroxyl group and we remove the hydroxyl group and we replace it with this group that came from that methanol alcohol. And by replacing it with this group, we essentially remove the presence of an aldehyde from the open chain form. And if there is no aldehyde presence in the open chain form, then that means when either of these glycosides are in the presence of oxidizing agents for example, the cupric acid that we spoke of earlier the Cu two. Plus the copper ion with the two plus charge. These will not react in the presence of oxidizing agents and they will not play the role of being the reducing sugars because in the open chain form they do not contain the aldehyde group. And so these are known as non reducing sugars because they will not act as reducing agents in the presence of an oxidizing agent.