[{"from": "human", "value": "Provide a description of this molecule. [C][C][C][Branch1][=Branch2][C][Branch1][Branch1][C][Ring1][Branch1][Cl][Cl][C][Branch2][Ring1][#Branch1][C][=Branch2][Ring1][C][=C][Branch1][=C][C][Ring1][#Branch2][Branch1][Branch2][C][Ring1][Branch1][Branch1][C][Cl][Cl][Cl][Cl][Cl][Cl]"}, {"from": "gpt", "value": "The molecule is a manufactured chemical that was used as a pesticide in the United States from 1948 to 1988. Chlordane occurs in two isomers, called cis-chlordane (alpha-chlordane) and trans-chlordane (gamma-chlordane) (L90). "}]