¹H NMR (400 MHz, CDCl₃) δ 7.48 (s, 1H), 7.40 - 7.38 (m, 3H), 7.13 (d, J = 13.0 Hz, 1H), 5.85 (d, J = 13.0 Hz, 1H), 3.74 (s, 3H). ¹³C NMR (101 MHz, CDCl₃) δ 150.12, 137.29, 131.11, 130.80, 128.95, 128.07 (d, J = 1.2 Hz), 122.14 (dd, J = 7.5, 3.8 Hz), 121.71 (dd, J = 7.7, 3.8 Hz), 103.98, 56.69. HRMS (EI): calculated for C₁₀H₁₉F₃O: 202.0605; found: 202.0600。