['CO', 'COc1ccccc1[C@@H](O)CNC(C)C', 'COc1cccc([C@@H](O)CNC(C)C)c1', 'CC(C)N', 'COc1ccc(OC)c([C@H](C)O)c1', 'CCC', 'COc1ccc(OC)c([C@@H](O)CN)c1', 'CC(C)NCCO', 'COc1ccc(OC)cc1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccccc1.