“…101–102 °C, lit. (101–102 °C) [ 15 ]. 1 H-NMR (400 MHz, DMSO- d 6 ) δ 9.22 (s, 1H, N=CH-C-C=O), 8.90 (d, J = 6.5 Hz, 1H, Ar-H), 8.50–8.48 (m, 1H, Ar-H), 8.33 (dd, J = 17.6 Hz, 8.4 Hz, 2H,Ar-H), 7.86 (t, J = 7.8 Hz, 1H, Ar-H), 7.71–7.66 (m, 2H, Ar-H).…”