¹H NMR (700 MHz, CDCl₃) δ 9.94 (s, 3H), 8.80 (dd, J = 1.4, 4.2 Hz, 5H), 8.77 (dd, J = 0.9, 7.4 Hz, 5H), 8.16 (dd, J = 1.4, 8.2 Hz, 5H), 7.53 (t, J = 7.8 Hz, 5H), 7.50 (d, J = 8.1 Hz, 5H), 7.46 (dd, J = 4.2, 8.3 Hz, 5H), 4.22 (s, 1H), 2.86 (s, 2H), 2.62 (tt, J = 3.7, 17.4 Hz, 5H), 2.03 (d, J = 11.3 Hz, 6H), 1.83 (dq, J = 3.6, 12.2 Hz, 9H), 1.48 (s, 40H).