1H NMR (400 MHz, CDCl3): δ 8.01 (d, J = 7.8 Hz, 4H), 7.52 (dd, J = 14.9, 7.6 Hz, 4H), 7.36 (s, 1H), 2.47 (s, 3H), 1.38 (s, 9H), 1.36 (s, 9H). 13C NMR (100 MHz, CDCl3): δ 181.3, 156.3, 154.0, 152.3, 150.4, 134.5, 129.4, 126.8, 126.3, 125.6, 125.4, 124.0, 117.3, 35.1, 34.8, 31.2, 31.1, 18.2. HRMS (EI): calcd for C26H30O2S: 406.1967; found, 406.1969.