ALEXANDRIA, Va., Feb. 26 -- United States Patent no. 12,234,222, issued on Feb. 25, was assigned to ZHEJIANG HISUN PHARMACEUTICAL Co. LTD. (Zhejiang, China).

"Piperazine amide derivative, preparation method therefor, and use thereof in medicine" was invented by Panpan Zhang (Zhejiang, China), Sunli Yan (Zhejiang, China), Ying Li (Zhejiang, China), Chenli Guo (Zhejiang, China), Wenjian Qian (Zhejiang, China), Cheng Ye (Zhejiang, China), Zhengzheng Shi (Zhejiang, China), Taishan Hu (Zhejiang, China) and Lei Chen (Zhejiang, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention relates to a piperazine amide derivative as represented by formula (I) or a pharmaceutically acceptable salt thereo...