mannose vs. glucose

a sugar, C 6 H 12 O 6 , having several optically different forms, the common dextrorotatory form dextroglucose, or d-glucose occurring in many fruits, animal tissues and fluids, etc., and having a sweetness about one half that of ordinary sugar, and the rare levorotatory form levoglucose, or l-glucose not naturally occurring.

Also called starch syrup.  a syrup containing dextrose, maltose, and dextrine, obtained by the incomplete hydrolysis of starch.