NMR:
1H NMR (400 MHz, CDCl3) δ ppm 7.40 (1 H, dd, J=7.8, 1.8 Hz), 7.34 (1 H, d, J=7.8 Hz), 7.22 - 7.31 (2 H, m), 6.93 - 7.02 (1 H, m), 6.84 - 6.91 (3 H, m), 6.75 - 6.82 (2 H, m), 5.53 (1 H, s), 5.10 (2 H, s), 3.76 (3 H, s), 2.73 - 2.86 (2 H, m), 2.33 - 2.42 (1 H, m), 2.25 (2 H, td, J=7.0, 2.4 Hz), 1.66 (2 H, t, J=7.0 Hz), 0.98 - 1.09 (1 H, m), 0.85 (6 H, s), 0.60 (1 H, tt, J=9.0, 4.5 Hz), 0.40 - 0.48 (1 H, m), 0.31 (1 H, dq, J=9.6, 4.8 Hz), 0.17 (1 H, dq, J=9.7, 5.0 Hz).
13C NMR (101 MHz, CDCl3) δ ppm 175.25, 157.95, 154.47, 152.55, 149.26, 148.84, 137.07, 136.52, 134.18, 130.54, 129.66, 129.56, 128.76, 128.66, 125.98, 120.22, 117.24, 115.80, 115.60, 114.38, 111.30, 68.57, 55.60, 47.71, 47.09, 45.30, 40.75, 29.39, 26.78, 17.99, 4.69, 3.98.
