¹H NMR (400 MHz, CDCl₃) δ 7.37 (d, J = 7.8 Hz, 2H), 7.29 (t, J = 7.4 Hz, 2H), 7.21 (t, J = 7.1 Hz, 1H), 6.07 (s, 1H), 2.52 (dd, J = 16.8, 10.7 Hz, 2H), 2.41 (dd, J = 18.8, 7.0 Hz, 3H), 2.12 – 2.05 (m, 2H), 1.88 – 1.71 (m, 7H). ¹³C NMR (101 MHz, CDCl₃) δ 215.34, 141.55, 135.04, 128.22, 126.75, 124.94, 122.10, 47.01, 38.55, 36.62, 33.23, 29.66, 27.91, 24.05, 20.96. HRMS (ESI): calcd for C₁₇H₂₁O [M + H]: 241.1492, found: 241.1490.