1H NMR (400 MHz, CDCl3) δ 7.78 (d, J = 7.5 Hz, 2H), 7.56 (t, J = 7.4 Hz, 1H), 7.45 (t, J = 7.5 Hz, 2H), 5.92 (s, 1H), 5.68 (s, 1H), 3.54 (s, 2H), 2.13 (s, 3H); 13C NMR (100 MHz, CDCl3) δ 197.0, 143.7, 137.5, 132.5, 129.5, 128.3, 126.0, 35.3, 15.5. HRMS (EI): calcd for C11H12OS: 192.0609; found: 192.0602.