US Patent Issued to GUANGZHOU BAIYUNSHAN PHARMACEUTICAL HOLDINGS Co. LTD. BAIYUNSHAN PHARMACEUTICAL GENERAL FACTORY on March 4 for "Nitrogen-containing spiro derivative as RET inhibitor" (Chinese Inventors)

ALEXANDRIA, Va., March 5 -- United States Patent no. 12,240,849, issued on March 4, was assigned to GUANGZHOU BAIYUNSHAN PHARMACEUTICAL HOLDINGS Co. LTD. BAIYUNSHAN PHARMACEUTICAL GENERAL FACTORY (Guangdong, China).

"Nitrogen-containing spiro derivative as RET inhibitor" was invented by Jiansong Wang (Guangdong, China), Zhifei Fu (Shanghai), Zhibo Luo (Guangdong, China), Miaorong Luo (Shanghai), Yang Zhang (Shanghai), Yalei Cai (Shanghai), Wu Zhu (Shanghai), Jian Li (Shanghai), Shuhui Chen (Shanghai), Yingxia Bao (Guangdong, China), Wei Wang (Guangdong, China) and Zhoufan Xie (Guangdong, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "Disclosed are a series of compounds with a nitrogen-containing spiro ...