[{"from": "human", "value": "Describe this molecule. [C][C][C][Branch2][Branch1][#C][C][C][C][Ring1][=Branch1][O][P][=Branch1][C][=O][Branch1][C][O-1][O][C][C][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].[Na+1].[Na+1].[Na+1].[Gd+3]"}, {"from": "gpt", "value": "The molecule is an intravenous contrast agent used with magnetic resonance angiography(MRA), which is a non-invasive way of imaging blood vessels. The agent allows for the vascular system to be imaged more clearly by the MRA. In this way, gadofosveset trisodium is used to help diagnose certain disorders of the heart and blood vessels."}]