['CC(C)(C)O', 'COc1ccc(CNC(=O)CCNC=O)cc1', 'COc1ccc(CN)cc1', 'CC(C)(C)OC(=O)NCCC=O', 'CC(C)(C)OC=O', 'COc1ccc(CNC(=O)CCN)cc1', 'CC(C)C', 'COc1ccc(CNC(=O)CCNC(=O)O)cc1', 'CO', 'CC(C)(C)OC(=O)NCCC(=O)NCc1ccccc1', 'COc1ccc(C)cc1', 'CC(C)(C)OC(=O)NCCC(N)=O', 'CC(C)(C)OC(N)=O', 'CCC(=O)NCc1ccc(OC)cc1', 'COc1ccccc1', 'CNC(=O)CCNC(=O)OC(C)(C)C']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccccc1.