['CN', 'CC(C)CCCNC(=O)NCc1ccc(C=O)cc1', 'CC(C)CCCNC=O', 'CNC(=O)c1ccc(CN)cc1', 'CC(C)CCCN', 'CNC(=O)c1ccc(CNC=O)cc1', 'CC(C)CCCNC(N)=O', 'CNC(=O)c1ccc(C)cc1', 'CCCC(C)C', 'CNC(=O)c1ccc(CNC(N)=O)cc1', 'CNC=O', 'CC(C)CCCNC(=O)NCc1ccccc1', 'CNC(=O)c1ccccc1', 'CNC(=O)NCCCC(C)C']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccccc1.