NMR:
1H NMR (500 MHz, Methanol-d4) δ 7.80 (dd, J = 8.3, 7.5 Hz, 1H), 7.53 (d, J = 7.3 Hz, 1H), 7.46 – 7.37 (m, 5H), 5.11 (ddd, J = 12.6, 8.2, 5.5 Hz, 1H), 4.75 (s, 2H), 4.63 (dd, J = 9.0, 5.2 Hz, 1H), 3.41 (ddd, J = 14.9, 9.0, 2.2 Hz, 1H), 3.30 – 3.14 (m, 5H), 2.86 (ddt, J = 19.8, 14.6, 5.2 Hz, 1H), 2.78 – 2.66 (m, 5H), 2.44 (s, 3H), 2.13 (ddq, J = 15.3, 7.7, 4.8, 3.8 Hz, 1H), 1.69 (s, 3H), 1.61 – 1.51 (m, 4H), 1.35 (s, 8H).
13C NMR (126 MHz, MeOD) δ 174.49, 172.65, 171.30, 169.80, 168.28, 167.74, 166.18, 157.03, 156.24, 152.18, 138.19, 138.08, 137.97, 134.92, 133.52, 133.23, 132.02, 131.99, 131.33, 129.76, 121.65, 119.30, 117.94, 69.36, 55.27, 50.57, 40.49, 40.13, 38.84, 32.19, 30.49, 30.34, 30.31, 30.22, 27.92, 27.82, 23.64, 14.42, 12.92, 11.60.
