['CCC', 'O=[N+]([O-])c1ccc(CNCCCO)cc1', 'CCCO', 'CC(C)NCc1ccc([N+](=O)[O-])cc1', 'CC(C)NCCCO', 'Cc1ccc([N+](=O)[O-])cc1', 'CC(C)N(C)CCCO', 'O=[N+]([O-])c1ccccc1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccccc1.