Provided are: a hydrated crystal of a compound (1) that has diffraction peaks at diffraction angles (2?±0.2°) of 10.7°, 10.9°, 14.4°, 19.1°, and 22.8° as determined by X-ray powder diffraction； a crystal of the compound (1) or a hydrated crystal of the compound (1) that has diffraction peaks at diffraction angles (2?±0.2°) of 7.2°, 8.9°, 13.2°, 16.4°, and 22.4°； an anhydride crystal of the compound (1) that has diffraction peaks at diffraction angles (2?±0.2°) of 10.3°, 14.2°, 14.6°, 16.1°, and 22.1°； and a crystal of the compound (1) or a hydrated crystal of the compound (1) that has diffractions peaks at the diffraction angles (2?±0.2°) of 7.3°, 10.7°, 16.3°, 19.8°, and 23.8°.
