['CCC', 'OCCNCc1ccc(O)c(Cl)c1', 'CC(C)O', 'OCCNCc1cccc(Cl)c1', 'NCCO', 'Cc1ccc(OC(C)C)c(Cl)c1', 'CCO', 'CC(C)Oc1ccc(CN)cc1Cl', 'CNCCO', 'CC(C)Oc1ccccc1Cl']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccccc1.