there is provided an antidiabetic enolic glucoside of phenylpyruvic acid and derivatives thereof for use as medicaments , especially normoglycemic agents , i . e . for lowering blood glucose levels to normal levels in mammals that are obese , pre - diabetic or have diabetes , obesity and / or syndrome x . hence the compounds of the present invention help to manage blood sugar levels , i . e . helping the body by balancing the blood sugar levels ; helping to keep balanced blood glucose levels , particularly in humans with diabetes ; aiding by enhancing the glucose uptake by the cells and by reducing sugar levels , thus improving or restoring the glucose tolerance ; optimizing the glycemic response ; normalizing the glucose tolerance .