[{"from": "human", "value": "Provide a brief overview of this molecule. [C][C][=Branch1][C][=O][C][C][C][C][N][C][=Branch1][C][=O][C][=C][Branch1][#Branch1][N][=C][N][Ring1][Branch1][C][N][Branch1][Branch1][C][Ring1][O][=O][C]"}, {"from": "gpt", "value": "The molecule is a xanthine derivative that decreases the viscosity of blood and is used to treat symptoms of intermittent claudication due to peripheral vascular disease. Pentoxifylline has not been associated with serum enzyme elevations during therapy, but in several isolated case reports has been linked to clinically apparent liver injury."}]