L-Dihydroorotic acid also known as (S)-45-dihydroorotate or dihydro-L-orotate belongs to the class of organic compounds known as alpha amino acids and derivatives.

Ribothymidine is an endogenous methylated nucleoside found in human fluids; methylated purine bases are present in higher amounts in tumor-bearing patients compared to healthy controls.DNA hypermethylation is a common finding in malignant cells and has been explored as a therapeutic target for hypomethylating agents.

DCZ0415 induces antimyeloma activity in vitro, in vivo and in primary cells of drug-resistant myeloma patients. DCZ0415 is a potent TRIP13 inhibitor that can impair the repair of non-homologous end junctions and inhibit NF-κB activity.DCZ0415 (10, 20 μM; 72 hours) showed a marked reduction in colony formation, indicating that it inhibited cell proliferation.