[{"from": "human", "value": "Could you provide a description of this molecule? [C][N][Branch2][Ring2][=Branch2][C][=C][Branch2][Ring2][Ring1][N][=C][Branch1][=Branch1][N][=C][Ring1][=Branch1][N][C][=N][N][Branch1][O][C][=C][Ring1][Branch1][C][=C][C][=N][Ring1][=Branch1][C][C][=C][C][=C][C][=C][Ring1][=Branch1][F][N][C][=Branch1][C][=O][O][C]"}, {"from": "gpt", "value": "The molecule is a stimulator of guanylate cyclase which causes relaxation of vascular smooth muscle and is used to treat severe pulmonary arterial hypertension. Riociguat has not been linked to significant serum enzyme elevations during therapy or to instances of clinically apparent acute liver injury."}]