ALEXANDRIA, Va., Sept. 30 -- United States Patent no. 12,428,394, issued on Sept. 30, was assigned to Chengdu Zenitar Biomedical Technology Co. Ltd. (Chengdu, China).

"2,4-disubstituted pyrimidine derivative, preparation method therefor and use thereof" was invented by Lijuan Chen (Sichuan, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention belongs to the field of chemical medicines, and particularly relates to a 2,4-disubstituted pyrimidine derivative, a preparation method therefor and a use thereof. The present invention provides a 2,4-disubstituted pyrimidine derivative, the structural formula of which is as shown in formula I. The present invention also provides a preparation meth...