1H NMR (400 MHz, CDCl3) δ 7.45 – 7.31 (m, 5H), 5.43 (d, J = 12.0 Hz, 1H), 4.62 - 4.56 (m, 1H), 4.51 - 4.48 (m, 1H), 2.96 (s, 1H). 13C{1H} NMR (101 MHz, CDCl3) δ 138.10, 128.95, 128.89, 125.89, 81.16, 70.92. GC-MS (m/z): 167.