¹H NMR (400 MHz, CDCl₃) δ 7.64 – 7.57 (m, 1H), 7.44 – 7.42 (m, 1H), 7.33 – 7.24 (m, 3H), 7.14 – 7.10 (m, 3H), 7.01 (s, 1H), 6.54 (s, 1H), 5.49 (s, 1H), 5.18 (s, 1H), 1.83 (s, 3H). ¹³C NMR (101 MHz, CDCl₃) δ 145.27, 137.45, 136.93, 135.62, 130.63, 130.01, 129.65, 129.05, 127.47, 126.03, 122.22, 120.99, 120.35, 111.71, 106.62, 103.59, 19.19. HRMS (EI): calcd for C₁₇H₁₅N: 233.1204, found: 233.1206。