[{"from": "human", "value": "Provide a brief overview of this molecule. [C][N][C][=C][Branch1][=N][C][=Branch1][C][=O][N][Branch1][Branch1][C][Ring1][#Branch1][=O][C][N][C][=N][Ring1][O]"}, {"from": "gpt", "value": "The molecule is an orally administered xanthine derivative that induces relaxation of smooth muscle in the bronchial tree causing bronchodilation. Theophylline is widely used in therapy of asthma and is not believed to cause liver injury."}]