¹H NMR (400 MHz, CDCl₃) δ 7.18 (d, J = 5.1 Hz, 1H), 6.99 – 6.92 (m, 1H), 6.91 (s, 1H), 5.11 (t, J = 4.4 Hz, 1H), 4.02 – 3.93 (m, 2H), 3.93 – 3.83 (m, 2H), 3.18 (d, J = 4.4 Hz, 2H). ¹³C NMR (101 MHz, CDCl₃) δ 137.51, 126.70, 126.48, 124.52, 103.83, 65.17, 34.99. HRMS (EI): calcd for C₈H₁₀O₂S: 170.0402, found: 170.0405。