6-methyl-2-[2-[(E)-(6-oxo-1-cyclohexa-2,4-dienylidene)methyl]hydraziny l]-1H-pyrimidin-4-one (NSC 73150) is a pyrimidine derivative with antitumor activity. Preclinical studies have shown that it inhibits the growth of a variety of tumor cell lines, including breast, lung, and liver cancers. It has also been found to induce apoptosis, inhibit angiogenesis and suppress tumor metastasis.