¹H NMR (400 MHz, CDCl₃) δ 7.91 (d, J = 8.4 Hz, 2H), 7.88 – 7.67 (m, 8H), 7.64 (d, J = 1.5 Hz, 1H), 7.61 (d, J = 1.5 Hz, 1H), 7.59 – 7.44 (m, 8H), 7.40 – 7.30 (m, 8H), 6.92 (dd, J = 4.2, 2.6 Hz, 2H), 6.20 – 6.11 (m, 1H), 6.07 – 6.01 (m, 1H). ¹³C NMR (101 MHz, CDCl₃) δ 140.18, 140.06, 140.02, 137.75, 137.40, 135.30, 133.46, 133.19, 132.79, 132.76, 130.87, 130.71, 129.87, 129.18, 129.09, 129.02, 128.99, 128.71, 128.36, 128.15, 128.04, 128.01, 127.96, 127.77, 127.66, 127.54, 127.47, 127.44, 126.60, 126.42, 126.29, 126.23, 126.05, 125.87, 125.71, 124.92, 106.55, 106.55. HRMS (EI): calcd for C₂₁H₁₆N₂: 296.1313, found: 296.1309。