['CCC', 'OCCNCc1cc(Cl)ccc1O', 'CC(C)O', 'OCCNCc1cccc(Cl)c1', 'NCCO', 'Cc1cc(Cl)ccc1OC(C)C', 'CCO', 'CC(C)Oc1ccc(Cl)cc1CN', 'CNCCO', 'CC(C)Oc1ccc(Cl)cc1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccccc1.