Carb-37. Higher Oligosaccharides

2-Carb-37.1. Oligosaccharides without a free hemiacetal group 

If derivatives are to be named on the basis of the trivial name, the component cited last in the systematic name receives locants with no primes, the preceding component singly-primed locants, etc. However, naming of trisaccharide and higher oligosaccharide derivatives systematically is preferred, to avoid ambiguity. 

2-Carb-37.2. Oligosaccharides with a free hemiacetal group 

Methyl (sodium a-L-idopyranosyluronate)-(1 - 4)-(2-acetamido-2-deoxy-a-D-glucopyranosyl)-(1 - 4)-(sodium P-D-glucopyranosyluronate)-(1 - 3)-P-D-galactopyranoside 

Higher oligosaccharides are named systematically in the same way. However, it is often preferable to give their structures by use of the symbolic approach outlined in 2-Carb-38). 

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