熔点: 165.5 - 167.2 ^oC. ¹H NMR (400 MHz, CDCl₃) δ 8.15 (d, J = 7.9 Hz, 2H), 8.04 (d, J = 7.9 Hz, 2H), 7.41 (d, J = 7.6 Hz, 2H), 7.33 (t, J = 7.4 Hz, 2H), 7.23 (s, 1H), 6.18 (s, 1H), 3.96 (s, 3H), 3.60 (s, 1H), 2.60 (s, 2H), 2.50 (dd, J = 28.9, 14.1 Hz, 2H), 2.19 (d, J = 13.4 Hz, 1H), 1.89 (dt, J = 21.0, 10.6 Hz, 1H). ¹³C NMR (101 MHz, CDCl₃) δ 202.79, 166.25, 141.61, 139.61, 136.36, 133.79, 129.95, 128.28, 126.97, 125.06, 122.81, 52.48, 41.70, 28.56, 27.11, 26.11. HRMS (ESI): calcd for C₂₁H₂₁O₃ [M + H]: 321.1491, found: 321.1497.