¹H NMR (400 MHz, CDCl₃) δ 7.65 (d, J = 7.2 Hz, 1H), 7.41 (d, J = 7.0 Hz, 2H), 7.37 - 7.32 (m, 4H), 7.24 (dd, J = 10.0, 5.8 Hz, 2H), 6.22 (s, 1H), 5.04 (d, J = 10.4 Hz, 1H), 4.67 - 4.51 (m, 2H), 2.85 (d, J = 16.5 Hz, 1H), 2.55 - 2.46 (m, 1H). ¹³C NMR (100 MHz, CDCl₃) δ 140.2, 139.9, 134.5, 131.6, 129.3, 128.6, 128.5, 127.5, 127.4, 127.1, 124.8, 122.0, 72.8, 67.0, 33.5. HRMS (ESI): C₁₇H₁₆ClO⁺: 271.0884, found: 271.0886.