[{"from": "human", "value": "Create a molecule that satisfies the conditions outlined in the description. The molecule is a sulfide mineral with formula CuFeS2. Chalcopyrite is the most important copper ore It is a sulfide mineral, a member of iron(2+) sulfides and a copper sulfide."}, {"from": "gpt", "value": "[S-2].[S-2].[Fe+2].[Cu+2]"}]