['CC(N)C(=O)NC(C)(C)C', 'O=CCN1C(=O)COc2cc(Br)ccc21', 'CC(C)(C)N', 'CC(C=O)NC(=O)CN1C(=O)COc2cc(Br)ccc21', 'CCC(=O)NC(C)(C)C', 'NC(=O)CN1C(=O)COc2cc(Br)ccc21', 'CC(C)C', 'CC(NC(=O)CN1C(=O)COc2cc(Br)ccc21)C(N)=O']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is O=C1COc2ccccc2N1.