['Nc1ccc(O)cc1', 'O=C/C=C/c1cccc(Cl)c1', 'Oc1ccccc1', 'NC(=O)/C=C/c1cccc(Cl)c1', 'Cc1cccc(Cl)c1', 'CC(=O)Nc1ccc(O)cc1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is O=C(/C=C/c1ccccc1)Nc1ccccc1.