¹H NMR (400 MHz, CDCl₃) δ 7.28 (s, 4H), 6.74 (d, J = 16.0 Hz, 1H), 5.98 (d, J = 16.0 Hz, 1H), 2.01 (d, J = 13.1 Hz, 2H), 1.71 (dd, J = 29.1, 16.4 Hz, 5H), 1.51 (t, J = 12.3 Hz, 2H), 1.23 (m, 1H). ¹³C{¹H} NMR (101 MHz, CDCl₃) δ 134.40, 133.57, 130.87, 129.56, 128.89, 128.69, 128.50, 127.64, 121.77, 41.56, 36.18, 24.72, 22.73. HRMS (ESI) m/z calcd for C₁₅H₁₆BrNNa⁺ [M+Na]⁺: 312.0358, found 312.0356.