1H NMR (400 MHz, CDCl3): δ 8.63 (s, 1H), 8.57 (s, 1H), 8.21 (d, J = 8.7 Hz, 1H), 8.08 (t, J = 10.1 Hz, 1H), 8.00 (dd, J= 12.6, 8.3 Hz, 2H), 7.96-7.89 (m, 3H), 7.87-7.81 (m, 1H), 7.69-7.55 (m, 2H), 7.52 (dd, J = 5.8, 3.1 Hz, 2H), 7.44 (s, 1H), 2.51 (s, 4H). 13C NMR (10O MHz, CDCl3): δ 181.6, 153.8, 150.6, 135.4, 134.5, 133.2, 133.1, 132.5, 130.9, 129.5, 128.7, 128.5, 128.4, 127.8, 127.7, 127.0, 126.9, 126.9, 126.7, 126.4, 125.2, 124.2, 123.5, 118.6, 18.1. HRMS (EI): calcd for C26H18O2S: 394.1028; found, 394.1023.
