4-[[[2-(Diethylamino)ethyl]amino]carbonyl]-3,5-dimethyl-1H-pyrrole-2-carboxylic Acid is an intermediate in the synthesis of Sunitinib Ketone Impurity (S820020), which is Sunitinib (S820000) impurity. A multi-kinase inhibitor targeting several receptor tyrosine kinases (RTK). Antineoplastic.