Page "Monosaccharide" Paragraph 15
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Generally, a monosaccharide with n asymmetrical carbons has 2 < sup > n </ sup > stereoisomers.
The number of open chain stereoisomers for an aldose monosaccharide is larger by one than that of a ketose monosaccharide of the same length.
Every ketose will have 2 < sup >( n-3 )</ sup > stereoisomers where n > 2 is the number of carbons.
Every aldose will have 2 < sup >( n-2 )</ sup > stereoisomers where n > 2 is the number of carbons.
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