¹H NMR (400 MHz, CDCl₃) δ 7.42 – 7.38 (m, 2H), 7.33 (t, J = 7.5 Hz, 2H), 7.29 – 7.23 (m, 1H), 6.55 (d, J = 16.3 Hz, 1H), 6.39 (d, J = 16.3 Hz, 1H), 6.01 (d, J = 181.6 Hz, 1H), 1.42 (s, 6H). ¹³C{¹H} NMR (101 MHz, CDCl₃) δ 179.20, 136.55, 134.50, 129.06, 128.55, 127.64, 126.25, 44.68, 25.19. HRMS (ESI) m/z calcd for C₁₂H₁₅NONa⁺ [M+Na]⁺: 212.1046, found 212.1052.