mp=169-173 oC; 1H NMR (400 MHz, CDCl3) δ 7.39 – 7.28 (dd, J = 14.9, 8.0 Hz, 5H), 7.00 (d, J = 7.3 Hz, 1H), 6.91 – 6.89 (m, 1H), 6.85 (d, J = 7.8 Hz, 1H), 3.91 (d, J = 14.6 Hz, 1H), 3.69 (d, J = 14.6 Hz, 1H), 3.17 (s, 3H), 1.38 (s, 3H); 13C NMR (100 MHz, CDCl3) δ: 25.5, 26.5, 45.5, 61.9, 108.4, 122.5, 123.9, 128.7, 129.0, 129.2, 129.2, 138.1, 140.0, 143.2, 177.4; HRMS (EI) m/z calcd for C17H16ClNO3S [M+]: 349.0539; found, 349.0535.