The maleate salt of an indole ether quinazoline derivative with antineoplastic activities. Competing with adenosine triphosphate, cediranib binds to and inhibits all three vascular endothelial growth factor receptor (VEGFR-1,-2,-3) tyrosine kinases, thereby blocking VEGF-signaling, angiogenesis, and tumor cell growth. Check for active clinical trials using this agent. (NCI Thesaurus)