“…IR spectrum, ν, cm -1 : 1432, 1480, 1503, 1608, 1654, 2172 (CN), 3044-3243 (NH). 1 H NMR spectrum (DMSO-d 6 ), δ, ppm: 2.46 t (2Н, СН 2 , 3 J HH 5.4 Hz), 3.29-3.34 br. m (2Н, СН 2 ), 3.42 t (2Н, СН 2 , 3 J HH 5.4 Hz), 3.47 t (2Н, СН 2 , 3 J HH 8.1 Hz), 6.27 s (1Н, NH), 8.30 s (1Н, NH).…”