mp=157-159 ^oC; ¹H NMR (400 MHz, CDCl₃) δ 7.87 (d, J = 7.8 Hz, 2H), 7.53 – 7.49 (m, 1H), 7.43 – 7.37 (dd, J = 14.7, 7.4 Hz, 4H), 7.35 – 7.31 (m, 2H), 7.25 – 7.23 (d, J = 7.0 Hz, 1H), 7.14 – 7.08 (dd, J = 14.6, 7.4 Hz, 2H), 6.94 – 6.92 (d, J= 7.7 Hz, 1H), 6.74 – 6.72 (d, J = 7.7 Hz, 1H), 5.10 – 5.06 (d, J = 15.8 Hz, 1H), 4.98 – 4.94 (d, J = 15.8 Hz, 1H), 3.80 – 3.69 (m, 2H), 1.49 (s, 3H); ¹³C NMR (100 MHz, CDCl₃) δ: 25.4, 43.9, 45.3, 45.7, 109.2, 121.6, 122.1, 127.1, 127.3, 127.6, 127.9, 128.4, 128.6, 133.1, 133.7, 136.2, 142.8, 180.5, 195.8; HRMS (EI) m/z calcd for C₂₄H₂₁NO₂ [M⁺]: 355.1572; found 355.1572.