Beta-D-Fructopyranose

Fructose is the most common ketohexose. It exists in honey and fruits, and combines with glucose to form the sucrose we eat every day. Fructose contains 6 carbon atoms and is also a monosaccharide, an isomer of glucose. It exists in large quantities in fruit juice and honey in a free state. Naturally occurring fructose exists in the form of free D-fructose. Under natural conditions, fructose exists in the form of an oily viscous liquid, not in the form of crystals.