“…The crystals formed were filtered off and dissolved in a small amount of ethanol, and petroleum ether was added until the solution became turbid. It was left in the refrigerator; the precipitate was filtered off and dried at 100 °C: yield 63%; white crystals; mp 185-186 °C; NMR (CDC13) Í 2.69-2.80 (m, 2 H, NCHü), 3.27-3.40 (m, 2 H, NCH2), 3.75-3.85 (m, 2 H, OCH2), 3.88 (s, 3 H, OCH3), 3.9-4.0 (m, 2 H, OCH2), 4.39 (s, 2 H, SCH2), 5.65 NMR (DMSO-d6) 0.7-0.98 (tt, 3 H, CCH3), 1.39-1.91 (qt, 2 H, CH2), 2.53-2.74 (qt, 2 H, C6CH2), 4.38 (s, 2 H, SCH2, 7.10-7.58 (m, 5 H, ArH). Anal.…”