¹H NMR (400 MHz, CDCl₃) δ 8.00 (d, J = 7.3 Hz, 2H), 7.61 – 7.56 (m, 1H), 7.49 (t, J = 7.4 Hz, 2H), 7.39 – 7.33 (m, 2H), 7.01 (t, J = 8.0 Hz, 2H), 6.12 (s, 1H), 3.61 (d, J = 7.7 Hz, 1H), 2.57 (t, J = 11.9 Hz, 2H), 2.47 (t, J = 18.1 Hz, 2H), 2.18 (d, J = 13.6 Hz, 1H), 1.94 – 1.82 (m, 1H). ¹³C NMR (101 MHz, CDCl3) δ 203.20, 161.98 (d, J = 245.7 Hz), 137.86 , 136.25, 135.35, 133.05, 128.74, 128.35, 126.57 (d, J = 7.8 Hz), 123.03, 115.07 (d, J = 21.2 Hz), 41.17, 28.66, 27.31, 26.21. HRMS (ESI): calcd for C₁₉H₁₈FO [M + H]: 281.1342, found: 281.1346.