sentence: The triazole linkage type in 14 and 20 was also evident from the H NMR spectra , which showed diagnostic proton resonances of 1,4 - linked triazoles at δ 8.04 for 14 and of 1,5 - linked triazoles at δ 7.80 for 20.382.4 Cyclic triazole-linked oligomers as acceptor substrates for Trypanosoma cruzi trans-sialidase ( TcTS ) .