[Problem] A salt or crystal of a compound which is highly stable in a solid state and useful as a bulk material for the preparation of a pharmaceutical product is provided. [Means for Solution] 4-{[(1R,2s,3S,5s,7s)-5-Hydroxy-2-adamantyl]amino}-1H-pyrrolo[2,3-b]pyridine-5-carboxamide succinate, 4-{[(1R,2s,3S,5s,7s)-5-hydroxy-2-adamantyl]amino}-1H-pyrrolo[2,3-b]pyridine-5-carboxamide hydrobromide, and 4-{[(1R,2s,3S,5s,7s)-5-hydroxy-2-adamantyl]amino}-1H-pyrrolo[2,3-b]pyridine-5-carboxamide hydrochloride and crystals thereof are useful as a bulk material for the preparation of a solid preparation, in particular, a solid dispersion preparation. Furthermore, the crystal of the hydrobromide has excellent stability in a solid state and is useful as a bulk material for the preparation of a pharmaceutical product.
