['CC(C)C', 'NC[C@H]1COc2ccccc2O1', 'CC(C)(C)N', 'C[C@H]1COc2ccccc2O1', 'CNC(C)(C)C', 'c1ccc2c(c1)OCCO2']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccc2c(c1)OCCO2.