['CCC', 'N[C@H]1CCN(Cc2ccccc2)C1', 'Cc1ccccc1', 'CC(C)N[C@H]1CCNC1', 'CC(C)N', 'c1ccc(CN2CCCC2)cc1', 'c1ccccc1', 'CC(C)N[C@H]1CCN(C)C1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccc(CN2CCCC2)cc1.