1. glucose (dextrose),
2. fructose (levulose),
3. galactose
4. xylose
5. ribose

Glucose (dextrose), Fructose (levulose), Galactose, xylose and ribose

John Milton Blocher has written:

'Osmotic pressure measurements of levulose solutions at thirty degrees ..' -- subject(s): Osmosis

Carbohydrate is an old term for saccharides (or glucides) but frequently used. They are generally formed from many monosaccharides. Some examples: sugar, maltose, fructose, starch, levulose, glucose, galactose, etc.

Glucose (or dextrose, but chemically 6-(hydroxymethyl)oxane-2,3,4,5-tetrol) is C6H12O6.

Fructose (or levulose but also called fruit sugar) is also C6H12O6 but it's structure is different than glucose.