The molecular formula C6H12O6 (molar mass: 180.15 g/mol) may refer to any of the following simple sugars: Hexoses, Allose, Altrose, Fructose, Galactose, Glucose, L-Glucose, Gulose, Idose, Mannose, Psicose, Sorbose, Tagatose, Talose,
Inositols, Allo-inositol, D-chiro-inositol, L-chiro-inositol, Cis-inositol, Epi-inositol, Muco-inositol, Neo-inositol, Scyllo-inositol.
However, if the compound isn't specified, it's likely to be glucose which is a sugar.