NMR:
1H NMR (400 MHz, CDCl3) δ (ppm): 8.18 (dd, J = 13.1, 8.0 Hz, 1H), 7.22-6.95 (m, 2H), 4.58 (dd, J = 7.7, 3.2 Hz, 0.5H), 4.43 (dt, J = 11.7, 5.8 Hz, 1H), 4.23 (q, J = 9.5 Hz, 0.5H), 4.16-4.01 (m, 1H), 3.75-3.58 (m, 1H), 3.58-3.41 (m, 1H), 3.29-3.09 (m, 2H), 2.35-2.06 (m, 2H), 2.06-1.81 (m, 2H), 1.46 (s, 4.5H), 1.34 (s, 4.5H).;
13C NMR (101 MHz, CDCl3) δ(ppm): 171.57, 171.31, 154.55, 153.63, 144.20, 143.99, 131.67, 131.40, 129.53, 129.22, 126.61, 126.47, 119.22, 119.08, 116.08, 115.82, 79.86, 79.78, 58.67, 58.44, 47.14, 46.90, 46.72, 30.45, 29.73, 29.58, 28.50, 28.31, 24.30, 23.73
