NMR:
1H NMR (500 MHz, DMSO-d6) δ 11.09 (s, 1H), 9.59 (s, 1H), 9.46 (s, 1H), 8.44 (d, J = 8.5 Hz, 1H), 8.38 (br, 1H), 8.25 (s, 1H), 8.18 (dd, J = 6.0, 5.5 Hz, 1H), 8.09 (s, 1H), 7.83 (d, J = 8.0 Hz, 1H), 7.60 (dd, J = 8.5, 8.0 Hz, 1H), 7.57 (dd, J = 8.0, 7.5 Hz, 1H), 7.34 (dd, J = 8.5, 8.0 Hz, 1H), 7.06 (d, J = 6.0 Hz, 1H), 6.93 (dd, J = 5.5, 5.5 Hz, 1H), 6.84 (d, J = 9.0 Hz, 1H), 6.75 (s, 1H), 5.06 (dd, J = 13.0, 5.5 Hz, 1H), 4.48 (m, J = 6.0 Hz, 1H), 3.93 (d, J = 5.5 Hz, 2H), 3.78 (m, 2H), 3.59 (m, 4H), 3.56 (m, 2H), 3.44 (m, 4H), 3.28 (m, 2H), 3.13 (m, 4H), 2.83–2.99 (m, 2H), 2.52–2.61 (m, 1H), 2.13 (s, 3H), 1.85–2.04 (m, 4H), 1.22 (d, J = 6.0 Hz, 6H), 1.15 (d, J = 7.0 Hz, 6H).
