¹H NMR (400 MHz, CDCl₃) δ 7.47 (t, J = 7.2 Hz, 2H), 7.40 (d, J = 7.4 Hz, 3H), 7.36 (d, J = 6.7 Hz, 2H), 7.32 (d, J = 7.2 Hz, 3H), 6.88 (s, 1H), 1.52 (s, 9H). ¹³C NMR (101 MHz, CDCl₃) δ 142.49, 139.74, 138.62, 129.78, 128.19, 128.12, 127.30, 127.06, 126.74, 122.47, 44.19, 30.99. HRMS (EI): calcd for C₁₈H₂₀S: 268.1286, found: 268.1288。