[{"from": "human", "value": "Create a molecule that satisfies the conditions outlined in the description. The molecule is a heterocyclic organic compound with antibiotic activity. In the body methenamine is converted to formaldehyde, a nonspecific bactericidal agent. Methenamine is typically used long-term to treat chronic urinary tract infections and to prevent the recurrence of infections."}, {"from": "gpt", "value": "[C][N][C][N][C][N][Ring1][=Branch1][C][N][Branch1][Ring2][C][Ring1][Branch2][C][Ring1][#Branch1]"}]