[{"from": "human", "value": "Provide a brief overview of this molecule. [C][=C][Branch1][=N][C][=Branch1][C][=O][N][C][=Branch1][C][=O][N][Ring1][Branch2][Br]"}, {"from": "gpt", "value": "The molecule is brominated derivative of uracil that acts as an antimetabolite or base analog, substituting for thymine in DNA. It can induce DNA mutations in the same way as 2-aminopurine. It is used mainly as an experimental mutagen, but its deoxyriboside derivative (5-bromo-2-deoxyuridine) is used to treat neoplasms. 5-bromouracil can be generated naturally, within the body, from uracil by either eosinophil peroxidase or myeloperoxidase. These enzymes preferentially brominate uracil at plasma concentrations of bromine and under moderately acidic conditions."}]