1H NMR (DMSO-d6, 600 MHz) 10
1H NMR (DMSO-d6, 600 MHz) 10.21 (s, 1H), 7.59 (s, 1H), 7.50 (d, = 7.2 Hz, 2H), 7.44-7.36 (m, 3H), 7.32 (s, 1H), 4.20 (s, 2H), 3.83 (s, 3H); 13C NMR (DMSO-d6, 150 MHz) 166.9, 162.0, 155.7, 137.0, 135.8, 130.2, 129.6, 128.6, 128.2, 127.4, 125.4, 109.6, 56.3, 36.7; HRMS-ESI(?) calcd for C16H12NO4 282.0766 [M-H]?, discovered … Read more