¹H NMR (400 MHz, CDCl₃): δ 8.19 (d, J = 7.7 Hz, 2H), 7.57 (t, J = 7.2 Hz, 1H), 7.48 (t, J = 7.5 Hz, 2H), 7.42 (d, J = 4.0 Hz, 3H), 7.40 – 7.29 (m, 4H), 7.25 – 7.21 (m, 2H), 6.94 (d, J = 7.4 Hz, 2H), 5.74 (s, 2H). ¹³C{¹H} NMR (101 MHz, CDCl₃): δ 184.2, 143.4, 139.1, 137.6, 137.5, 132.6, 130.7, 129.5, 129.2, 129.2, 128.9, 128.7, 128.5, 128.1, 127.4, 126.1,49.2. HRMS (EI) m/z: calcd for C₂₃H₁₈N₂O, 338.1419; found, 338.1418.