US Patent Issued to Jiangsu Hengrui Medicine on Sept. 22 for "Crystal of benzofuran derivative free base and preparation method" (Chinese Inventors)

ALEXANDRIA, Va., Sept. 24 -- United States Patent no. RE51,039, issued on Sept. 22, was assigned to Jiangsu Hengrui Medicine Co. LTD. (Lianyungang, China).

"Crystal of benzofuran derivative free base and preparation method" was invented by Likun Wang (Lianyungang, China), Zhenxing Du (Lianyungang, China), Qiyun Shao (Lianyungang, China) and Chao Xu (Lianyungang, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "This application describes a crystal of a benzofuran derivative free base and a preparation method. Specifically, this application describes crystal A, crystal B, crystal C, and crystal D of N-((4,6-dimethyl-2-carbonyl-1,2-dihydropyridin-3-yl)methyl)-5-ethyl-6-(ethyl(tetrahydro-2H-pyran)4-yl)amino)...