Structural elucidation of the oxidation product of aminoethylcysteine ketimine decarboxylated dimer by peroxynitrite

Aminoethylcysteine ketimine decarboxylated dimer () is a natural sulfur compound with antioxidant properties. Inhibits some reactions mediated by peroxynitrite, a strong oxidizing and nitrating agent that reacts with several biomolecules. This work aims to elucidate the structure of the product resulting from the interaction of with peroxynitrite using 1D and 2D NMR experiments and ion trap mass spectrometry. This product is a dimerized form of and is hereafter referred to as . During the reactions leading to and during the formation of , no chiral selection is operated; all optical isomers are present in D2O and have been evidenced by 1H NMR methods in D2O plus β- or γ-cyclodextrin.