1H NMR (400 MHz, CDCl3) δ 7.86 – 7.79 (m, 3H), 7.78 (s, 1H), 7.57 (d, J = 8.5 Hz, 1H), 7.51 – 7.45 (m, 2H), 6.93 (d, J= 15.9 Hz, 1H), 6.16 (d, J = 15.9 Hz, 1H), 1.59 (s, 6H). 13C{1H} NMR (101 MHz, CDCl3) δ 133.48, 133.16, 130.67, 129.99, 128.35, 128.02, 127.64, 126.86, 126.41, 126.16, 123.44, 123.33, 35.02, 27.73. GC-MS (m/z) = 221.