¹H NMR (400 MHz, CDCl₃) δ 8.13 (d, J = 7.6 Hz, 1H), 7.89 (d, J = 7.2 Hz, 1H), 7.82 (d, J = 8.0 Hz, 1H), 7.72 (d, J = 7.0 Hz, 1H), 7.53 - 7.47 (m, 3H), 7.43 (d, J = 7.4 Hz, 2H), 7.34 (d, J = 7.3 Hz, 2H), 7.25 (d, J = 8.8 Hz, 1H), 6.29 (s, 1H), 5.46 - 5.33 (m, 1H), 4.65 (s, 2H), 2.97 - 2.81 (m, 2H). ¹³C NMR (100 MHz, CDCl₃) δ 140.0, 138.0, 134.6, 133.9, 130.6, 129.0, 128.5, 128.2, 127.5, 126.1, 125.6, 125.6, 124.8, 123.5, 123.4, 122.2, 73.5, 66.9, 34.2. HRMS (EI): calcd for C₂₁H₁₈O: 286.1358, found: 286.1355.