[{"from": "human", "value": "Create a molecule with the structure as the one described. The molecule is a halomethane that is dichloromethane in which oneof the hydrogens has been replaced by a bromine atom.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."}, {"from": "gpt", "value": "[C][Branch1][C][Cl][Branch1][C][Cl][Br]"}]