So the O simply means the bond is between carbon and oxygen and not between carbon and nitrogen, as the case is in the end glycositic bond. Now, what's the entire point of carrying out this reaction? Why do our cells actually want to create these glycosides? 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.