1H NMR (400 MHz, CDCl3) δ 7.28 (s, 4H), 6.70 (d, J = 15.9 Hz, 1H), 6.00 (d, J = 15.9 Hz, 1H), 1.52 (s, 6H). 13C{1H} NMR (101 MHz, CDCl3) δ 134.12, 133.62, 130.92, 128.70, 128.53, 127.67, 123.11, 34.81, 27.44. GC-MS (m/z) = 205.