... The chemistry of lH—1,2,4-triazole compounds has been well investigated,” but that of lH-1,2,3- and 2H—1,2,3 ... 1997 Pharmaceutical Society of ... 13C-NMR spectra were obtained on a JEOL EX-270 spec- trometer (270 MHZ for 1H; 67.8 MHz for 13C), and the chemical shifts are ...