α and β-fructose The two forms have different configuration about C2 .
Fructose does not reduce Br2 water .
Epimers
Monosaccharides differing in configuration at a carbon other than anomeric carbon are called epimers , e . g ., glucose and galactose differ in configuration at C4 , hence called epimers .
Osazones
Monosaccharides and reducing disaccharides react with excess of phenyl hydrazine to form crystalline substances of the structure
It is known as osazones glucose and fructose give same osazone .