4-(3'-Methylphenyl)amino-3-pyridinesulfonamide is a heterocyclic organic compound featuring a pyridine core substituted with a sulfonamide group and an aniline derivative. It is a key synthetic intermediate in the preparation of more complex pharmaceutical agents. This compound is primarily recognized as a crucial precursor in the synthesis of Tivozanib (AV-951), a potent and selective small-molecule inhibitor of vascular endothelial growth factor receptor (VEGFR) tyrosine kinases. Tivozanib is an oral medication developed for the treatment of advanced renal cell carcinoma (RCC). The specific structural motif of this intermediate is essential for building the pharmacophore responsible for VEGFR binding and inhibition, which targets tumor angiogenesis. As a specialized building block with a defined and significant role in oncology drug development, its primary value lies in pharmaceutical research and manufacturing. Its handling requires standard laboratory safety precautions for organic compounds.