[{"from": "human", "value": "Provide a description of this molecule. [C][C][Branch1][Ring1][C][Cl][Branch1][Ring1][C][Cl][Cl]"}, {"from": "gpt", "value": "The molecule is a chloroalkane that is 1,3-dichloropropane substituted by a chloro group and a methyl group at position 2."}]