¹H NMR (400 MHz, CDCl₃) δ 7.26 – 7.21 (m, 2H), 7.17 – 7.10 (m, 2H), 6.94 – 6.87 (m, 2H), 6.83 – 6.76 (m, 2H), 6.39 (s, 1H), 3.83 (s, 3H), 3.80 (s, 3H), 3.06 – 2.62 (m, 2H), 1.66 (dt, J = 12.7, 7.4 Hz, 2H), 1.43 (dq, J = 14.6, 7.3 Hz, 2H), 0.93 (t, J = 7.3 Hz, 3H). ¹³C NMR (101 MHz, CDCl₃) δ 158.71, 137.85, 135.19, 132.16, 130.92, 129.70, 128.24, 123.55, 113.82, 113.55, 55.28, 55.19, 34.61, 32.39, 21.79, 13.67. HRMS (EI): calcd for C₂₀H₂₄O₂S: 328.1497, found: 328.1498。