¹H NMR (400 MHz, CDCl₃) δ 8.00 (d, J = 7.6 Hz, 2H), 7.60 – 7.55 (m, 1H), 7.48 (t, J = 7.4 Hz, 2H), 7.40 (d, J = 7.6 Hz, 2H), 7.32 (t, J = 7.3 Hz, 2H), 7.23 (d, J = 8.3 Hz, 1H), 6.18 (s, 1H), 3.60 (s, 1H), 2.59 (s, 2H), 2.49 (dd, J = 34.5, 14.1 Hz, 2H), 2.18 (d, J = 12.0 Hz, 1H), 1.88 (ddd, J = 21.3, 12.2, 8.9 Hz, 1H). ¹³C NMR (101 MHz, CDCl₃) δ 203.32, 141.75, 136.29, 133.03, 128.74, 128.37, 128.34, 126.92, 125.08, 123.14, 41.31, 28.76, 27.21, 26.29. HRMS (EI): calcd for C₁₉H₁₈O: 262.1358, found: 262.1356.