“…-112.1 C,1 H NMR (600 MHz, CDCl 3 ) d (ppm): 3.71 (s, 2H, CH 2 ); 7.28 (d, J ¼ 6.8 Hz, 2H, Ar); 7.35 (t, J ¼ 7.3 Hz, 1H, Ar); 7.39 (t, J ¼ 7.3 Hz, 2H, Ar); 7.44 (s, 1H, NH 2 ); 9.29 (s, 1H, NH 2 ); 9.88 (s, 1H, NH);13 C NMR (150 MHz, CDCl 3 ): 43.97; 128.06; 129.22; 129.38; 132.19; 171.72; 182.01; MS (ESI) m/z 195 (M þ H) þ ; Anal. Calcd for C 9 H 10 N 2 OS: C, 55.65; H, 5.19; N, 14.42; S, 16.51; found: C, 55.…”