FRUCTOSE, occurs mixed with glucose (q.v.) in fruit juices, and is combined with glucose as sucrose (cane sugar). It has the same molecular formula as glucose, and is a ketose (ke tone-alcohol) of the hexose class. It is also known as fruit-sugar or laevulose, the latter name arising from the fact that solutions of the sugar are laevorotatory, i.e., rotate the plane of polarization of light to the left. It is sometimes prescribed for diabetics in place of sucrose. (See CARBOHYDRATES.)