METHODS FOR SELECTIVELY REMOVING COUNTERIONS FROM COMPOUNDS AND COMPOUNDS DERIVED FROM SUCH METHODS

摘要

Methods of selectively removing counterions from compounds are disclosed. Compounds derived from the methods, such as the compound S-[2-[(1-Iminoethyl)amino]ethyl]-2-methyl-L-cysteine zwitterion with between zero and up to 2 molar equivalents of hydrochloride are also disclosed.