“…S N H 2 N HO White solid, 31% yield. 1 H NMR (300 MHz, DMSO-d 6 ) δ 9.61 (s, 1H), 7.47 (dd, J = 3.6 Hz, 0.9 Hz, 1H), 7.41 (dd, J = 5.1 Hz, 0.9 Hz, 1H), 7.03 (dd, J = 5.1 Hz, 3.6 Hz, 1H), 5.92 (bs, 2H). 13 C NMR (75 MHz, DMSO-d 6 ) δ 147.9, 137.0, 127.…”