And if this was uracil, we'd call it uridine. Now if we take and we remove this oh group, then we essentially change our sugar riboseuge into the deoxyribose sugar. And now this would no longer be adenosine, it would be deoxy adenosine. And likewise, if this was deoxyribose and guanosine, we'd call it deoxyguanosine and so forth. So these are the four nucleotides found in RNA and these are the four nucleotides found in DNA molecules. And notice that the linkage between the carbon found on the sugar and the nitrogen found on our base is the beta glycosync linkage.