[{"from": "human", "value": "Could you give me a brief overview of this molecule? [C][Branch1][C][Cl][Branch1][C][Cl][Br]"}, {"from": "gpt", "value": "The molecule is a halomethane that is dichloromethane in which oneof the hydrogens has been replaced by a bromine atom. It occurs as a contaminant in drinking water. It has a role as a reagent and an environmental contaminant."}]