[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is a phosphine."}, {"from": "gpt", "value": "[C][=C][C][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][P][=Branch1][C][=O][Branch1][#Branch2][C][C][C][C][C][=Branch1][C][=O][O][C][=C][C][=C][C][=C][Ring1][=Branch1]"}]