CPC C07C 247/10 (2013.01) [C07B 2200/13 (2013.01)] | 16 Claims |
1. 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°.
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