¹H NMR (400 MHz, CDCl₃) δ: 7.96 (d, J = 7.9 Hz, 2H), 7.54 – 7.58 (m, 1H), 7.43 – 7.47 (m, 2H), 3.98 – 3.93 (m, 2H), 3.46 – 3.50 (m, 1H), 3.32 – 3.26 (dd, J = 16.0, 6.7 Hz, 1H), 2.95 – 2.90 (dd, J = 16.0, 5.7 Hz, 1H), 1.86 – 1.84 (m, 1H), 1.75 (d, J = 12.9 Hz, 1H), 1.60 – 1.50 (m, 3H), 1.41 – 1.33 (m, 1H). ¹³C NMR (100 MHz, CDCl₃) δ: 23.4, 25.8, 32.0, 45.4, 68.6, 74.3, 128.2, 128.5, 133.0, 137.3, 198.4.