['CC(N)C(=O)NC(C)(C)C', 'COc1cc(/C=C/C=O)cc2c1OCCO2', 'CC(C)(C)N', 'COc1cc(/C=C/C(=O)NC(C)C=O)cc2c1OCCO2', 'CO', 'CC(NC(=O)/C=C/c1ccc2c(c1)OCCO2)C(=O)NC(C)(C)C', 'CCC(=O)NC(C)(C)C', 'COc1cc(/C=C/C(N)=O)cc2c1OCCO2', 'CC(C)C', 'COc1cc(/C=C/C(=O)NC(C)C(N)=O)cc2c1OCCO2', 'COc1cc(C)cc2c1OCCO2', 'CC(=O)NC(C)C(=O)NC(C)(C)C']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccc2c(c1)OCCO2.