1) Sulfonic acid 
Glutaurine is a chemical compound which is an amide formed from glutamic acid and taurine. ==Biological role== Glutaurine, an endogenous compound (KEGG: C05844), has been noted as an antiepileptic, with antiamnesia properties. The dipeptide γ-glutamyltaurine (γ-GT; glutaurine, Litoralon) was discovered in the parathyroid in 1980, and later in th...