Selumetinib (AZD6244) Selumetinib (AZD6244) Synonyms: 5-[(4-Bromo-2-chlorophenyl)amino]-4-fluoro-N-(2-hydroxyethoxy)-1-methyl-1H-benzimidazole-6-carboxamide CAS NO.: 606143-52-6 Formula: C17H15BrClFN4O3 Weight: 457.681