 The name "Neuberg ester" comes from the German biochemist Carl Neuberg.In 1918, he found that the compound (later identified as fructose 6-phosphate) was beproduced by mild acid hydrolysis of fructose 2,6-bisphosphate.Fructose 6-phosphate lies within the glycolysis metabolic pathway and is produced by isomerisation of glucose 6-phosphate.