1H NMR (600 MHz, CDCl3) δ 8.33 (s, 1H), 8.30 (s, 1H), 8.17 (s, 1H), 7.93 (s, 1H), 6.09 (d, J = 3.3 Hz, 1H), 6.01 (d, J = 2.4 Hz, 1H), 5.97 (m, 4H), 5.42 (dd, J = 6.5 Hz, J = 2.4 Hz, 1H), 4.93–4.86 (m, 2H), 4.54–4.49 (m, 1H), 4.33 (td, J = 6.8 Hz, J = 3.3 Hz, 1H), 4.29–4.24 (m, 1H), 4.08 (dt, J = 6.2 Hz, J = 3.2 Hz, 1H), 3.99 (dd, J = 11.5 Hz, J = 3.7 Hz, 1H), 3.78–3.63 (m, 6H), 2.84–2.74 (m, 3H), 2.71–2.51 (m, 3H), 2.33–2.23 (m, 1H), 1.91–1.82 (m, 1H), 1.58 (s, 3H), 1.46 (s, 18H), 1.36 (s, 3H), 0.91 (s, 9H), 0.90 (s, 9H), 0.10–0.05 (m, 12H).