A crystalline maleate salt of S-[2-[(1-Iminoethyl)amino]ethyl]-2-methyl-L-cysteine is disclosed. The crystalline salt has absorption of less than one percent water by weight at 90% R.H. at 25° C., a melting point of 123° C., and aqueous solubility in excess of 230 mg ml
−1
.
本发明公开了S-[2-[(1-亚
氨基乙基)
氨基]乙基]-2-甲基-
L-半胱氨酸的结晶
马来酸盐。该晶体盐在25°C,90%相对湿度下重量吸收
水分低于1%,熔点为123°C,
水溶性超过230毫克/毫升。