ALEXANDRIA, Va., Oct. 6 -- United States Patent no. 12,753,167, issued on Oct. 6, was assigned to WUHAN JIANMIN DAPENG PHARMACEUTICAL Co. LTD. (Hubei, China).

"Intermediate of biliverdin, and preparation method and use thereof" was invented by Fapu Chen (Wuhan, China), Yuxin Shi (Wuhan, China) and Fakai Chen (Wuhan, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "An intermediate of biliverdin represented by formula 1, and preparation method and use thereof: in formula 1, R is C1-C5 alkyl, or benzyl; "" at positions A and B independently represent a single bond or a double bond; when "" represents a single bond, R1 or R2 connected to the single bond is selected from one of tosyl, p-toluenesulfonyl, pheny...