¹H NMR (400 MHz, CDCl₃) δ 7.74 – 7.61 (m, 1H), 7.23 – 7.07 (m, 4H), 6.88 – 6.73 (m, 3H), 6.62 (d, J = 3.2 Hz, 1H), 5.99 (s, 2H), 5.48 (s, 1H), 5.27 (s, 1H). ¹³C NMR (101 MHz, CDCl₃) δ 148.45, 147.97, 144.56, 136.39, 131.31, 129.25, 128.67, 121.97, 121.10, 120.90, 120.16, 111.89, 108.25, 107.29, 106.91, 103.04, 101.36. HRMS (EI): calcd for C₁₇H₁₃NO₂: 263.0946, found: 263.0942。