Disclosed are novel crystalline forms of (S)-5-benzyl-N-(5-methyl-4-oxo-2,3,4,5- tetrahydrobenzo[b][1,4]oxazepin-3-yl)-4H-1,2,4-triazole-3-carboxamide, and solvates thereof and pharmaceutical compositions containing the same. Also disclosed are processes for the preparation thereof and methods for use thereof.
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