“…The NMR spectra are in good agreement with the literature. 71 1 H NMR (500 MHz, CDCl 3 ): δ = 8.35 (d, J = 8.9 Hz, 2H), 7.94 (s, 1H), 7.86 − 7.80 (m, 3H), 7.62 − 7.58 (m, 1H), 7.44 − 7.40 (m, 1H), 7.37 (td, J = 7.5, 1.2 Hz, 1H). 13 C NMR (151 MHz, CDCl 3 ): δ = 156.1, 147.1, 143.0, 139.2, 127.9, 125.6, 125.4, 124.5, 123.8, 120.8, 120.2, 112.3.…”