CPC C07D 405/12 (2013.01) [C07D 235/06 (2013.01)] | 20 Claims |
1. A pidolate salt of a compound represented by Formula 1, prepared by a process comprising:
a) dissolving a compound represented by Formula 1 and pyroglutamic acid in an organic solvent, thereby creating a solution;
b) concentrating the solution under decompression to precipitate a solid, then adding a co-solvent and stirring; and
c) filtering out and drying the precipitated solid:
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