['CC(C)(C)NCC=O', 'CN(C)Cc1ccccc1CN', 'CNC', 'Cc1ccccc1CNC(=O)CNC(C)(C)C', 'CC(C)(C)NCC(N)=O', 'Cc1ccccc1CN(C)C', 'CC(C)(C)N', 'CC(=O)NCc1ccccc1CN(C)C', 'CC(C)C', 'CN(C)Cc1ccccc1CNC(=O)CN', 'CN(C)C', 'CC(C)(C)NCC(=O)NCc1ccccc1', 'CNC(=O)CNC(C)(C)C', 'CN(C)Cc1ccccc1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccccc1.