NMR:
1H NMR (400 MHz, CDCl3) δ 0.79 (m, 2H), 1.12 (m, 2H), 1.41 (s, 3H), 2.14 (s, 3H), 2.62 (s, 6H), 2.74 (tt, J = 7.0, 4.0 Hz, 1H), 3.20 (s, 3H), 6.70 (dd, J = 8.4, 8.4 Hz, 1H), 6.99 (dt, J = 6.3, 2.3 Hz, 1H), 7.28–7.35 (m, 2H), 7.45 (d, J = 8.4 Hz, 1H), 7.52 (dd, J = 9.6, 1.9 Hz, 1H), 7.64 (brs, 1H), 7.71 (brs, 1H), 11.29 (s, 1H);
13C-NMR (100 MHz, CDCl3) δ: 8.6, 13.6, 24.8, 25.5, 34.8, 41.2, 88.3 (d, J = 6.9 Hz), 90.1, 103.9, 119.1, 120.5, 124.5, 125.3, 126.0 (d, J = 21.5 Hz), 128.4 (d, J = 11.5 Hz), 129.4, 134.2 (d, J = 3.8 Hz), 139.1, 140.5, 145.0, 151.9, 152.2, 155.3 (d, J = 254.1 Hz), 164.0, 165.0, 168.5.
