1H NMR (400 MHz, CDCl3) δ 7.98 (d, J = 13.7 Hz, 1H), 7.56 (dd, J = 16.0, 10.9 Hz, 3H), 7.47 (d, J = 8.2 Hz, 2H), 4.60 (s, 2H). 13C{1H} NMR (101 MHz, CDCl3) δ 141.45, 138.16, 137.40, 129.98, 129.41, 45.22. GC-MS (m/z): 197.