mp：120-124 oC; 1H NMR (400 MHz, CDCl3) δ 7.39 (d, J = 8.8 Hz, 2H), 7.31 – 7.27 (m, 1H), 7.08 (d, J = 7.3 Hz, 1H), 6.96 – 6.92 (m, 1H), 6.83 (m, 3H), 3.86 (d, J = 16.4 Hz, 4H), 3.66 (d, J = 14.5 Hz, 1H), 3.15 (s, 3H), 1.38 (s, 3H); 13C NMR (100 MHz, CDCl3) δ: 25.5, 26.5, 45.6, 55.6, 62.0, 108.4, 114.0, 122.5, 124.1, 128.5, 129.6, 130.0, 131.4, 143.2, 163.4, 177.7; HRMS (EI) m/z calcd for C18H19NO4S [M] +: 345.1035; found, 345.1026
