Hexosaminuronic acid

All known hexosaminuronic acids have an amino group in the 2-position. Seven 2-amino-2-deoxyhexuronic acids are known, namely, those with the D-gluco, D-manno, d- and L-galacto, L-talo, L-altro, and h-gulo configurations. None of these is very common, and some have been found in one... 

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