[{"from": "human", "value": "Based on the given information, design a molecule that meets the desired specifications. The molecule is a Paramagnetic Contrast Agent. The mechanism of action of gadofosveset is as a Magnetic Resonance Contrast Activity."}, {"from": "gpt", "value": "[H+1].[H+1].[H+1].[C][C][C][Branch2][Branch1][#C][C][C][C][Ring1][=Branch1][O][P][=Branch1][C][=O][Branch1][C][O-1][O][C][C@@H1][Branch2][Ring1][=N][C][N][Branch2][Ring1][C][C][C][N][Branch1][#Branch1][C][C][=Branch1][C][=O][O-1][C][C][=Branch1][C][=O][O-1][C][C][=Branch1][C][=O][O-1][N][Branch1][#Branch1][C][C][=Branch1][C][=O][O-1][C][C][=Branch1][C][=O][O-1][Branch1][=Branch2][C][=C][C][=C][C][=C][Ring1][=Branch1][C][=C][C][=C][C][=C][Ring1][=Branch1].[Gd+3]"}]