This application relates to compositions containing ULTRAPURE n4u2013 dihydrate (ciclopropilmetil) u20136u2013 [(3R) u20133u2013 (methylamino) pirrolidinu20131u2013il] pirimidinu20132,4u2013diamina tartrate,Methods for its preparation, formulations containing them, Methods for using them to treat diseases and conditions mediated by H4 and alternative forms of Salt of the same.
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