¹H NMR (400 MHz, CDCl₃) δ 7.41 – 7.30 (m, 10H), 7.24 – 7.18 (m, 2H), 7.06 (d, J = 2.4 Hz, 1H), 6.91 (dd, J = 8.9, 2.4 Hz, 1H), 6.64 (d, J = 3.3 Hz, 1H), 6.30 (d, J = 3.3 Hz, 1H), 3.87 (s, 3H). ¹³C NMR (101 MHz, CDCl₃) δ 155.03, 141.28, 138.60, 131.70, 130.89, 130.24, 128.83, 128.76, 128.38, 127.75, 127.73, 127.67, 127.48, 121.61, 112.11, 110.52, 103.61, 103.01, 55.83. HRMS (EI): calcd for C₂₃H₁₉NO: 325.1467, found: 325.1463。