['CC(C)CNC=O', 'CNCc1cccc(OC)c1', 'CC(C)CN', 'COc1cccc(CN(C)C=O)c1', 'CO', 'CC(C)CNC(=O)N(C)Cc1ccccc1', 'COc1cccc(C)c1', 'CNC(=O)NCC(C)C', 'CC(C)C', 'COc1cccc(CN(C)C(N)=O)c1', 'COc1ccccc1', 'CC(C)CNC(=O)N(C)C']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccccc1.