['NCCCC(N)=O', 'Cc1ccc(S(=O)(=O)C2(C=O)CCC2)cc1', 'CCCC(N)=O', 'Cc1ccc(S(=O)(=O)C2(C(N)=O)CCC2)cc1', 'NC(=O)CCCNC=O', 'Cc1ccc(S(=O)(=O)C2CCC2)cc1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is O=S(=O)(c1ccccc1)C1CCC1.