¹H NMR (400 MHz, CDCl₃) δ 7.69 – 7.67 (m, 1H), 7.35 – 7.29 (m, 2H), 7.27 (d, J = 3.2 Hz, 1H), 7.20 – 7.13 (m, 2H), 6.99 – 6.98 (m, 1H), 6.91 (d, J = 3.6 Hz, 1H), 6.64 (d, J = 3.2 Hz, 1H), 5.67 (s, 1H), 5.30 (s, 1H). ¹³C NMR (101 MHz, CDCl₃) δ 140.60, 138.87, 136.46, 129.07, 128.42, 127.51, 126.64, 126.30, 122.06, 120.94, 120.30, 111.58, 107.95, 103.09. HRMS (EI): calcd for C₁₄H₁₁NS: 225.0612, found: 225.0615。