[{"from": "human", "value": "Generate a molecule based on the given description. The molecule appears as red needles or reddish-purple solid. "}, {"from": "gpt", "value": "[CH1-1][C][=C][C][=C][Ring1][Branch1].[CH1-1][C][=C][C][=C][Ring1][Branch1].[Cr+2]"}]