1H NMR (400 MHz, CDCl3) δ 7.70 (d, J = 7.7 Hz, 2H), 7.25 (d, J = 8.1 Hz, 2H), 5.87 (s, 1H), 5.64 (s, 1H), 3.53 (s, 2H), 2.42 (s, 3H), 2.12 (s, 3H); 13C NMR (100 Hz, CDCl3) δ 1 96.7, 143.9, 143.3, 134.8, 129.7, 129.0, 125.1, 100.0, 35.5, 21.6, 15.5. HRMS (EI): calcd for C12H14OS: 206.0765; found: 206.0761.