['CC(C)(C)NCC=O', 'NCc1ccc2c(c1)OCCO2', 'CC(C)C', 'NCC(=O)NCc1ccc2c(c1)OCCO2', 'CC(C)(C)N', 'CC(=O)NCc1ccc2c(c1)OCCO2', 'CC(C)(C)NCC(N)=O', 'Cc1ccc2c(c1)OCCO2', 'CNC(=O)CNC(C)(C)C', 'c1ccc2c(c1)OCCO2']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccc2c(c1)OCCO2.