1H NMR (400 MHz, CDCl3) δ 7.74 (d, J = 8.0 Hz, 2H), 7.30 (d, J = 8.0 Hz, 2H), 5.87 (s, 1H), 5.66 (s, 1H), 3.53 (s, 2H), 2.97 (dt, J = 13.8, 6.9 Hz, 1H), 2.12 (s, 3H), 1.28 (s, 3H), 1.27 (s, 3H); 13C NMR (100 MHz, CDCl3) δ 196.7, 154.1, 143.9, 135.1, 129.9, 126.4, 125.0, 35.5, 34.2, 23.7, 15.5. HRMS (EI): calcd for C14H18OS: 234.1078; found: 234.1076.