¹H NMR (400 MHz, CDCl₃) δ 8.81 (s, 2H), 8.06 (s, 1H), 7.59 (d, J = 8.2 Hz, 4H), 7.54 (d, J = 8.3 Hz, 4H), 1.38 (s, 18H).¹³C{H} NMR (101 MHz, CDCl₃) δ 151.4, 146.4, 136.5, 134.8, 132.7, 126.9, 126.1, 34.6, 31.3.HRMS (EI) m/z: [M]⁺ Calcd for C₂₅H₂₉N: 343.2300; Found: 343.2302。