SEARCH Articles Figures Tables 18<). isotopic labelling with Hydrogen isotopes Hydrogenation labeled Isotope isotopic labeling Isotope label Isotope-labelled Isotopic hydrogen Isotopic labeling Isotopic labeling with Isotopic labelled Isotopic labelling Isotopic labels Isotopic specification Isotopical labeling Labeling with Labeling with hydrogen isotopes Labelled with Labelled with isotopic Specific isotopic labelling Specific labeling