US Patent Issued to MediBeacon on July 28 for "Method for preparing 3,6-diaminopyrazine-2,5-dicarboxylic acid and synthetic intermediate thereof" (Chinese, American Inventors)

ALEXANDRIA, Va., July 28 -- United States Patent no. 12,692,240, issued on July 28, was assigned to MediBeacon Inc. (St. Louis).

"Method for preparing 3,6-diaminopyrazine-2,5-dicarboxylic acid and synthetic intermediate thereof" was invented by Junho Zheng (Zhejiang, China), Xuming Hong (Zhejiang, China), Duqian Zhang (Zhejiang, China), Thomas E. Rogers (St. Louis) and Elena Cacchillo (St. Louis).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method for preparing 3,6-diaminopyrazine-2,5-dicarboxylic acid and a synthetic intermediate thereof. The method comprises the step of preparing pyrimido[4,5-g]pteridine-2,4,7,9(1H,3H,6H,8H)-tetraone or a disalt (pteridine) thereof from 5-aminouracil or a single salt th...