<unk>  is a chemical intermediate in the glycolysis metabolic pathway.  (It should not be confused with the similarly named glycerate<unk><unk>  or glyceraldehyde<unk><unk> .)
Glycerol 3-phosphate
Glycerin
Glycerol phenylbutyrate
Sodium phosphates
Uridine triacetate
Alpha-ketoglutaric acid
Fructose 1,6-bisphosphate
Phosphocreatine