¹H NMR (400 MHz, CDCl₃) δ 8.24 (d, J = 7.5 Hz, 2H), 7.60 – 7.54 (m, 1H), 7.54 – 7.45 (m, 5H), 7.43 (d, J = 6.9 Hz, 2H), 7.26 (s, 1H), 4.41 (t, J = 7.5 Hz, 2H), 1.80 – 1.65 (m, 2H), 0.81 (t, J = 7.3 Hz, 3H). ¹³C{¹H} NMR (101 MHz, CDCl₃) δ 184.6, 143.3, 138.6, 138.0, 132.4, 130.7, 129.4, 129.3, 129.1, 129.0, 128.8, 128.0, 47.4, 24.6, 10.9. HRMS (EI) m/z: calcd for C₁₉H₁₈N₂O, 290.1419; found, 290.1421.