1H NMR (300 MHz, DMSO-d6) δ 8.10 – 7.99 (m, 1H), 7.90 – 7.78 (m, 1H), 7.68 – 7.56 (m, 2H), 4.49 (t, J = 7.7 Hz, 2H), 2.85 (s, 3H), 2.60 – 2.43 (m, 3H), 1.96 (q, 2H), 1.74 (q, J = 7.5 Hz, 2H), 1.53 (s, 6H). 13C NMR (101 MHz, DMSO) δ 196.96, 142.35, 141.67, 129.84, 129.42, 123.85, 116.10, 54.61, 50.62, 47.87, 26.51, 22.66, 22.53, 14.31. LCMS m/z: 294.1 [M -1]