Definition of Rare Sugars
Monosaccharides and their derivatives being rare in nature.
ISRS concerns the following sugars.
(1) Rare monosaccharides such as L-glucose, D-allose, D-allulose, D-tagatose,
xylitol, L-ribose and so on.
(2) Oligosaccharides containing rare monosaccharides
(3) Starting materials for production of rare sugars like common sugars,
polyols and various building blocks.
(4) Supramolecular rare sugars.