NMR:
1H NMR (400 MHz, DMSO-d6, 120 oC) δ 8.29 (s, 1H), 7.51 (t, J = 1.2 Hz, 1H), 7.36 (dd, J = 8.4, 5.4 Hz, 2H), 7.26 (d, J = 1.7 Hz, 2H), 7.15 (t, J = 8.7 15 Hz, 2H), 5.87 (d, J = 5.4 Hz, 1H), 5.31 – 5.12 (m, 1H), 4.86 (d, J = 17.7 Hz, 1H), 4.74 – 4.54 (m, 2H), 4.40 (d, 16 J = 16.8 Hz, 1H), 3.22 – 3.07 (m, 1H), 3.02 (ddd, J = 16.3, 8.7, 4.2 Hz, 1H), 2.75 – 2.61 (m, 4H), 2.50 – 2.43 (m, 2H), 1.40 (d, J = 7.1 Hz, 3H);
13C NMR (101 MHz, DMSO-d6, 120 oC) δ 174.04, 167.67, 163.18, 160.75, 156.23, 154.35, 146.54, 143.73, 133.74, 130.33, 128.68, 127.38, 124.47, 117.96, 115.63, 114.39, 94.60, 46.31, 42.14, 35.60, 35.56, 30.26, 26.50;
