['C[C@H]1[C@H](C)CCC[C@H]1N', 'CON(C)S(=O)(=O)c1cccc(C=O)c1', 'C[C@@H]1CCCC[C@H]1C', 'CON(C)S(=O)(=O)c1cccc(C(N)=O)c1', 'C[C@H]1[C@H](C)CCC[C@H]1NC=O', 'CON(C)S(=O)(=O)c1ccccc1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is O=C(NC1CCCCC1)c1ccccc1.