['NCc1ccc2c(c1)OCO2', 'CC(C)CN(CC=O)CC(C)C', 'CC(C)C', 'CC(C)CNCC(=O)NCc1ccc2c(c1)OCO2', 'CC(C)CNCC(C)C', 'CC(=O)NCc1ccc2c(c1)OCO2', 'Cc1ccc2c(c1)OCO2', 'CC(C)CN(CC(N)=O)CC(C)C', 'c1ccc2c(c1)OCO2', 'CNC(=O)CN(CC(C)C)CC(C)C']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccc2c(c1)OCO2.