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. So, unlike the unmodified D glucose, as we spoke about just a moment ago, the glucose glycoside does not react in the presence of oxidizing agents. And this is because it cannot be converted into an open chain form with an aldehyme group. And such unreactive sugars are known as non reducing sugars.