[{"from": "human", "value": "Generate a molecule based on the given description. The molecule is an orange red to black brown crystalline powder. Denser than water. (USCG, 1999)"}, {"from": "gpt", "value": "[Li+1].[Li+1].[O-1][Cr][=Branch1][C][=O][=Branch1][C][=O][O][Cr][=Branch1][C][=O][=Branch1][C][=O][O-1]"}]