[{"from": "human", "value": "Could you provide a description of this molecule? [C][=Branch2][Ring1][Ring2][=C][Branch1][S][C][Branch1][=Branch2][C][=Branch1][Branch1][=C][Ring1][Branch1][Cl][Cl][Branch1][C][Cl][Cl][Cl][Cl]"}, {"from": "gpt", "value": "The molecule is a light, lemon-yellow liquid that has a sharp, musty odor. It easily turns from a liquid to a vapor when exposed to air. The vapor looks like a blue haze. HCCPD is a manufactured chemical and does not occur naturally in the environment. It is made by adding chlorine to cyclopentadiene, or by removing chlorine from octachlorocyclopentane. HCCPD is used to make a group of related pesticides (aldrin, chlordane, dieldrin, endosulfan, endrin, heptachlor, isodrin, mirex, and pentac) referred to cyclodienes. Only two of these pesticides, endosulfan and pentac, are currently registered for use in the United States. (L437)"}]