['CC(C)CN', 'O=CCNC(=O)c1ccccc1I', 'O=Cc1ccccc1I', 'CC(C)CNC(=O)CN', 'CC(C)C', 'NC(=O)CNC(=O)c1ccccc1I', 'CC(=O)NCC(C)C', 'NC(=O)c1ccccc1I', 'Ic1ccccc1', 'CC(C)CNC(=O)CNC=O']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccccc1.