¹H NMR (400 MHz, CDCl₃): δ 8.00 (d, J = 14.1 Hz, 2H), 7.36 (d, J = 6.6 Hz, 3H), 7.31 – 7.19 (m, 5H), 7.15 (d, J = 6.6 Hz, 2H), 6.96 (d, J = 7.3 Hz, 2H), 5.73 (s, 2H), 2.43 (s, 3H), 2.34 (s, 3H). ¹³C{¹H} NMR (101 MHz, CDCl₃): δ 184.5, 143.5, 139.2, 138.5, 137.7, 137.7, 133.4, 131.0, 130.2, 129.9, 129.1, 128.7, 128.5, 128.5, 128.0, 127.9, 127.3, 126.4, 126.1, 49.2, 21.4, 21.3. HRMS (EI) m/z: calcd for C₂₅H₂₂N₂O, 366.1732; found, 366.1733.