US 12,240,796 B2
Crystals and production method for the same
Eriko Sato, Tokushima (JP); Noriaki Shiina, Tokushima (JP); and Mifuyu Ueno, Tokushima (JP)
Assigned to OTSUKA CHEMICAL CO., LTD., Osaka (JP)
Appl. No. 17/786,731
Filed by OTSUKA CHEMICAL CO., LTD., Osaka (JP)
PCT Filed Dec. 18, 2020, PCT No. PCT/JP2020/047326
§ 371(c)(1), (2) Date Jun. 17, 2022,
PCT Pub. No. WO2021/125306, PCT Pub. Date Jun. 24, 2021.
Claims priority of application No. 2019-230664 (JP), filed on Dec. 20, 2019.
Prior Publication US 2023/0022116 A1, Jan. 26, 2023
Int. Cl. C07C 243/38 (2006.01); B60C 1/00 (2006.01); C08K 5/25 (2006.01)
CPC C07C 243/38 (2013.01) [B60C 1/00 (2013.01); C08K 5/25 (2013.01); C07B 2200/13 (2013.01)] 13 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 6.1±0.2°.