	US 12,404,233 B2
	Crystals of 3-hydroxy-N'-(1,3-dimethylbutylidene)-2-naphthoic acid hydrazide and production method for the same
Eriko Sato, Tokushima (JP); Noriaki Shiina, Tokushima (JP); Kazuki Tsubokura, Tokushima (JP); and Mifuyu Ueno, Tokushima (JP)
Assigned to OTSUKA CHEMICAL CO., LTD., Osaka (JP)
Appl. No. 17/786,765
Filed by OTSUKA CHEMICAL CO., LTD., Osaka (JP)
PCT Filed Dec. 18, 2020, PCT No. PCT/JP2020/047329 § 371(c)(1), (2) Date Jun. 17, 2022, PCT Pub. No. WO2021/125307, PCT Pub. Date Jun. 24, 2021.
Claims priority of application No. 2019-230668 (JP), filed on Dec. 20, 2019.
Prior Publication US 2023/0035012 A1, Feb. 2, 2023
Int. Cl. C07C 251/76 (2006.01); B60C 1/00 (2006.01); C07C 247/10 (2006.01); C08K 5/25 (2006.01)

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°.