[{"from": "human", "value": "Provide a description of this molecule. [C][N+1][Branch2][Ring2][#Branch2][C@@H1][C][C][Branch1][N][C][C@H1][Ring1][=Branch1][C@H1][C@@H1][Ring1][#Branch1][O][Ring1][Ring1][O][C][=Branch1][C][=O][C][Branch1][Branch2][C][=C][C][=C][S][Ring1][Branch1][Branch1][Branch2][C][=C][C][=C][S][Ring1][Branch1][O][C]"}, {"from": "gpt", "value": "The molecule is a quaternary ammonium ion obtained by methylation of the tertiary amino group of (1alpha,2beta,4beta,5alpha,7beta)-7-[(hydroxydi-2-thienylacetyl)oxy]-9-methyl-3-oxa-9-azoniatricyclo[3.3.1.0(2,4)]nonane. Used (in the form of the bromide hydrate) for maintenance treatment of airflow obstruction in patients with chronic obstructive pulmonary disease. It has a role as a muscarinic antagonist and a bronchodilator agent."}]