1H NMR (400 MHz, CDCl3) δ 7.19 (d, J = 4.9 Hz, 1H), 7.04 – 6.95 (m, 2H), 6.89 (d, J = 15.7 Hz, 1H), 5.88 (d, J = 15.7 Hz, 1H) 1.53 (s, 6H). 13C{1H} NMR (101 MHz, CDCl3) δ 140.52, 129.69, 127.47, 126.69, 124.82, 123.25, 123.18, 34.80, 27.62. GC-MS (m/z) = 177.