ALEXANDRIA, Va., March 31 -- United States Patent no. 12,590,098, issued on March 31, was assigned to AXCESO BIOPHARMA Co. LTD. (Anyang-si, South Korea).

"Pyrimido pyrimidinone compound and pharmaceutical composition comprising the same" was invented by Young Jun Park (Yongin-si, South Korea), Sung Jun Park (Suwon-si, South Korea), Hyebin Yoo (Gwangju-si, South Korea), Hyunnam Song (Yongin-si, South Korea), Si-Eun Yun (Yongin-si, South Korea), Sojin Park (Yongin-si, South Korea), Joon Woo Kim (Yongin-si, South Korea) and Sung Il Yoon (Hwaseong-si, South Korea).

According to the abstract* released by the U.S. Patent & Trademark Office: "Diclosed are a pyrimido pyrimidinone compound having an effect of inhibiting PD-L1 expression, a pharmac...