NMR:
1H NMR (400 MHz, chloroform-d) δ 8.12 (t, J = 1.8 Hz, 1H), 7.92 (ddd, J = 7.8, 1.9, 1.1 Hz, 1H), 7.84 (ddd, J = 7.8, 1.8, 1.1 Hz, 1H), 7.64 (t, J = 7.7 Hz, 1H), 7.57–7.51 (m, 2H), 7.29–7.26 (m, 2H), 7.04 (d, J = 3.4 Hz, 1H), 7.02–6.98 (m, 2H), 6.28 (d, J = 3.4 Hz, 1H), 4.40 (s, 2H), 4.35 (q, J = 7.1 Hz, 2H), 4.31 (s, 2H), 3.10 (s, 3H), 2.65 (s, 6H), 2.33 (s, 3H), 1.38 (t, J = 7.1 Hz, 3H);
13C NMR (100 MHz, chloroform-d) δ (ppm) 158.6, 154.4, 144.6, 143.1, 142.3, 141.4, 140.6, 138.8, 135.7, 132.8, 132.3, 132.2, 130.1, 129.9, 127.6, 126.2, 125.9, 118.7, 111.4, 61.1, 50.1, 44.7, 41.6, 23.0, 21.2, 14.5;
