['NC(=O)c1ccc(Cl)c(N)c1', 'O=[SH](=O)/C=C/c1ccc(Cl)cc1', 'NC(=O)c1ccc(Cl)cc1', 'NS(=O)(=O)/C=C/c1ccc(Cl)cc1', 'NC=O', 'O=S(=O)(/C=C/c1ccc(Cl)cc1)Nc1ccccc1Cl']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is O=S(=O)(/C=C/c1ccccc1)Nc1ccccc1.