NMR:
1 H NMR ( 1 H NMR (500 MHz, Chloroform-d) δ 9.68 (s, 1H), 8.89 (s, 1H), 8.70 (d, J = 5.6 Hz, 1H), 7.85 (s, 1H), 7.46 (t, 1H), 7.42 (d, J = 5.6 Hz, 1H), 7.30 (s, 1H), 7.08 (d, J = 7.1 Hz, 1H), 6.86 (d, J = 8.5 Hz, 1H), 6.54 (s, 2H), 6.49 (t, J = 5.3 Hz, 1H), 4.93 – 4.85 (m, 1H), 3.84 (s, 6H), 3.73 (s, 2H), 3.70 – 3.64 (m, 9H), 3.60 (t, J = 5.0 Hz, 2H), 3.50 – 3.46 (m, 3H), 3.45 – 3.40 (m, 2H), 3.14 (s, 2H), 2.88 – 2.82 (m, 1H), 2.76 – 2.69 (m, 2H), 2.30 (s, 3H), 2.14 – 2.09 (m, 1H).
13C NMR (126 MHz, Chloroform-d) δ 171.23, 168.61, 167.57, 159.46, 151.67, 150.92, 146.73, 141.73, 136.05, 135.99, 132.55, 120.49, 117.86, 117.40, 116.65, 111.72, 110.41, 105.30, 70.83, 70.28, 70.21, 69.32, 60.65, 55.97, 48.90, 48.65, 43.07, 42.33, 39.01, 37.12, 31.39, 29.70, 22.94.
