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A diose is a monosaccharide containing two carbon atoms. Because the general chemical formula of an unmodified monosaccharide is (C·H2O)n, where n is three or greater, it does not meet the formal definition of a monosaccharide. However, since it does fit the formula (C·H2O)n, it is sometimes thought of as the most basic sugar. The large number of sugars prepared synthetically, some of which have not yet been found in nature, together with the natural sugars are subdivided into groups. We distinguish, in the first place, between the more simple sugars called ''monosaccharides'' and compound sugars called ''polysaccharides''. The latter may be regarded as formed from two or more molecules of the former with elimination of water, and, as a matter of fact, the simpler sugars may be formed from them by hydrolysis. There is only one possible diose, glycolaldehyde (2-hydroxyethanal), which is an aldodiose (a ketodiose is not possible since there are only two carbons). == See also == * Triose * Tetrose * Pentose * Hexose * Heptose 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Diose」の詳細全文を読む スポンサード リンク
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