1H NMR (400 MHz, CDCl3) δ 8.48 (s, 1H), 7.95 (s, 1H), 7.66 - 7.56 (m, 2H), 7.09 (s, 1H), 2.56 (s, 3H). 13C{1H} NMR (101 MHz, CDCl3) δ 155.32, 148.76, 142.85, 137.04, 122.58, 121.85, 95.45, 16.78. GC-MS (m/z) = 277.