沸点：149.7 - 151.3 ^oC. ¹H NMR (400 MHz, CDCl₃) δ 7.81 (d, J = 7.6 Hz, 1H), 7.61 (t, J = 7.4 Hz, 1H), 7.45 (d, J = 7.6 Hz, 1H), 7.40 (t, J = 7.4 Hz, 1H), 7.34 (d, J = 7.6 Hz, 2H), 7.16 (d, J = 7.7 Hz, 2H), 6.18 (d, J = 4.2 Hz, 1H), 3.13 (d, J = 17.3 Hz, 1H), 2.98 (d, J = 17.3 Hz, 1H), 2.74 – 2.54 (m, 3H), 2.36 (s, 3H), 2.07 (ddd, J = 23.3, 14.9, 5.1 Hz, 2H), 1.70 (dd, J = 12.7, 4.3 Hz, 1H). ¹³C NMR (101 MHz, CDCl₃) δ 211.14, 152.84, 138.67, 136.70, 135.93, 135.82, 134.92, 129.04, 127.49, 126.73, 124.91, 124.35, 121.68, 48.22, 39.08, 35.07, 29.30, 24.86, 21.09. HRMS (EI): calcd for C₂₁H₂₀O: 288.1514, found: 288.1516.