Crystals of 3-hydroxy-N'-(1,3-dimethylbutylidene)-2-naphthoic acid hydrazide and production method for the same

Crystals of 3-hydroxy-N′-(1,3-dimethylbutylidene)-2-naphthoic acid hydrazide having an X-ray powder diffraction pattern comprising characteristic peaks at least at angles of diffraction (2θ) of 6.9±0.2°, 14.5±0.2°, 15.5±0.2°, 19.1±0.2°, 23.4±0.2°, 24.1±0.2°, 27.9±0.2° and 28.8±0.2°.

Crystals of 3-hydroxy-N′-(1,3-dimethylbutylidene)-2-naphthoic acid hydrazide having an X-ray powder diffraction pattern comprising a peak of maximum intensity at an angle of diffraction (2θ) of 11.4±0.2° and/or 25.2±0.2°.

Crystals of 3-hydroxy-N′-(1,3-dimethylbutylidene)-2-naphthoic acid hydrazide having an X-ray powder diffraction pattern comprising characteristic peaks at least at angles of diffraction (2θ) of 11.2±0.2°, 11.4±0.2°, 13.5±0.2°, 15.5±0.2°, 15.8±0.2°, 16.3±0.2°, 18.4±0.2°, 21.6±0.2°, 22.0±0.2°, 25.2±0.2° and 26.3±0.2°.

Crystals comprising crystals of 3-hydroxy-N′-(1,3-dimethylbutylidene)-2-naphthoic acid hydrazide having an X-ray powder diffraction pattern comprising a peak of maximum intensity at an angle of diffraction (2θ) of 6.9±0.2° and crystals of 3-hydroxy-N′-(1,3-dimethylbutylidene)-2-naphthoic acid hydrazide having an X-ray powder diffraction pattern comprising a peak of maximum intensity at an angle of diffraction (2θ) of 11.4±0.2° and/or 25.2±0.2°.

Crystals comprising crystals of 3-hydroxy-N′-(1,3-dimethylbutylidene)-2-naphthoic acid hydrazide having an X-ray powder diffraction pattern comprising characteristic peaks at least at angles of diffraction (2θ) of 6.9±0.2°, 14.5±0.2°, 15.5±0.2°, 19.1±0.2°, 23.4±0.2°, 24.1±0.2°, 27.9±0.2° and 28.8±0.2° and crystals of 3-hydroxy-N′-(1,3-dimethylbutylidene)-2-naphthoic acid hydrazide having an X-ray powder diffraction pattern comprising characteristic peaks at least at angles of diffraction (2θ) of 11.2±0.2°, 11.4±0.2°, 13.5±0.2°, 15.5±0.2°, 15.8±0.2°, 16.3±0.2°, 18.4±0.2°, 21.6±0.2°, 22.0±0.2°, 25.2±0.2° and 26.3±0.2°.