¹H NMR (400 MHz, CDCl₃) δ 9.12 (d, J = 1.9 Hz, 1H), 8.27 (d, J = 2.0 Hz, 1H), 8.09 (d, J = 8.7 Hz, 1H), 7.76 – 7.67 (m, 3H), 7.66 – 7.62 (m, 1H), 7.52 (t, J = 7.5 Hz, 2H), 7.43 (t, J = 7.4 Hz, 1H), 3.19 – 3.06 (m, 1H), 1.38 (d, J = 6.9 Hz, 6H). ¹³C{¹H} NMR (101 MHz, CDCl₃) δ 148.9, 147.7, 146.1, 138.0, 133.8, 133.1, 129.5, 129.1, 128.9, 128.1, 128.0, 127.4, 124.0, 34.1, 23.8.