[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule appears as colorless crystals. Corrosive to metals. Used as an herbicide."}, {"from": "gpt", "value": "[C][C][=C][Branch1][#Branch2][C][=C][C][=Branch1][Ring2][=C][Ring1][=Branch1][Cl][O][C][Branch1][C][C][C][=Branch1][C][=O][O]"}]