ALEXANDRIA, Va., Sept. 10 -- United States Patent no. 12,410,140, issued on Sept. 9, was assigned to JUMPCAN (SHANGHAI) MEDICAL TECHNOLOGY Co. LTD (Shanghai).

"Method for synthesis of roxadustat and intermediate thereof, and intermediate thereof" was invented by Yong Zhang (Shanghai), Guo Wang (Shanghai), Fei Yang (Shanghai), Fengwei Liu (Shanghai), Chundong Zhou (Shanghai) and Zitong Zhang (Shanghai).

According to the abstract* released by the U.S. Patent & Trademark Office: "Disclosed are a method for the synthesis of roxadustat and an intermediate thereof, and an intermediate thereof. In particular, disclosed is a method for the synthesis of compound M1, the method comprising the following steps: carrying out a reaction as shown below ...