nmr is a powerful analytical technique to evaluate the structures of carbon compounds. The technique is used (i) to identify unknown compounds, (ii) to check for impurities and (iii) to study the shapes of molecules. In medicine, magnetic resonance imaging uses nmr to detect the hydrogen nuclei in the human body, especially in water and lipids. The term ‘nuclear’ interprets the technique that detects nuclei of atoms such as hydrogen-1 (proton)