熔点： 110.9 - 112.5 ^oC. ¹H NMR (400 MHz, CDCl₃) δ 7.91 (d, J = 7.7 Hz, 2H), 7.41 (d, J = 7.5 Hz, 2H), 7.34 (d, J = 7.3 Hz, 2H), 7.29 (d, J = 7.8 Hz, 2H), 7.23 (d, J = 7.2 Hz, 1H), 6.19 (s, 1H), 3.57 (d, J = 10.3 Hz, 1H), 2.59 (s, 2H), 2.57 – 2.44 (m, 2H), 2.43 (s, 3H), 2.17 (d, J = 12.9 Hz, 1H), 1.93 – 1.83 (m, 1H). ¹³C NMR (101 MHz, CDCl₃) δ 202.94, 143.78, 141.77, 136.24, 133.76, 129.39, 128.47, 128.29, 126.86, 125.05, 123.22, 41.16, 28.81, 27.22, 26.33, 21.64. HRMS (EI): calcd for C₂₀H₂₀O: 276.1514, found: 276.1510.