The present invention provides a novel type of salts of (2S)-[4-(carboxymethyl)thiazole-2-ylthio]-N-{[4-(3,4-dichlorobenzyl)morpholine-2-yl]methyl}acetamide.Among said novel type of salts of (2S)-[4-(carboxymethyl)thiazole-2-ylthio]-N-{[4-(3,4-dichlorobenzyl)morpholine-2-yl]methyl}acetamide, the hydrobromide salt is not so easy to a dsorb the moisture when compared with the corresponding free compound. Therefore, it is a stable compound not easy to cause weight change due to moisture adsorption, and consequently it is an excellent parent drug for medicine.本發明係提供一種(2S)－[4－(羧甲基)噻唑－2－基硫基]－N－{[4－(3,4－二氯苯甲基)嗎啉－2－基]甲基}乙醯胺之新穎的鹽形態。在該(2S)－[4－(羧甲基)噻唑－2－基硫基]－N－{[4－(3,4－二氯苯甲基)嗎啉－2－基]甲基}乙醯胺之新穎的鹽形態中，氫溴酸鹽與該游離體相較之下，前者為不易吸附水分而引起重量變化之安定性化合物，在作為醫藥品之原藥方面極為優異。
