¹H NMR (400 MHz, CDCl₃) δ 7.90 (d, J = 13.7 Hz, 1H), 7.67 (t, J = 1.7 Hz, 1H), 7.60 (dd, J = 8.0, 2.7 Hz, 1H), 7.55 (d, J = 13.7 Hz, 1H), 7.47 (d, J = 7.8 Hz, 1H), 7.32 (t, J = 7.9 Hz, 1H). ¹³C{¹H} NMR (101 MHz, CDCl₃) δ 137.94, 137.22, 134.73, 131.95, 131.55, 130.75, 127.57, 123.28. GC-MS (m/z): 228.