mp=147-149 oC; 1H NMR (400 MHz, CDCl3) δ 7.57 (m, 1H), 7.47 (d, J = 7.6 Hz, 2H), 7.41 – 7.37 (m, 2H), 7.22 (dd, J= 8.3, 1.9 Hz, 1H), 6.80 (dd, J = 8.7, 5.1 Hz, 2H), 3.89 (d, J = 14.7 Hz, 1H), 3.68 (d, J = 14.7 Hz, 1H), 3.21 (s, 3H), 1.36 (s, 3H); 13C NMR (100 MHz, CDCl3) δ: 25.1, 26.6, 45.6, 61.6, 109.2, 124.4, 127.4, 127.7, 128.5, 128.8, 130.9, 133.5, 139.6, 141.9, 177.1; HRMS (EI) m/z calcd for C17H16ClNO3S [M+]: 349.0539; found, 349.0538.