Diose
A diose is a monosaccharide containing two carbon atoms. Because the general chemical formula of an unmodified monosaccharide is n, where n is three or greater, it does not meet the formal definition of a monosaccharide. However, since it does fit the formula n, it is sometimes thought of as the most basic sugar.
There is only one possible diose, glycolaldehyde, which is an aldodiose.
