SEARCH Articles Figures Tables 14N and 15N NMR 15N NMR spectroscopy 15N-NMR chemical shift 2-sy?/ro-Triazolopyridines 15N-NMR-spectra Chemical shifts 15N NMR spectroscopy NMR spectroscopy HMQC (15N-multiple quantum NMR spectroscopy HSQC (15N-multiple quantum Natural abundance 15N NMR