['CC(C)CN', 'C[C@@H](NC=O)c1ccccc1Br', 'CC(C)CNC=O', 'C[C@@H](N)c1ccccc1Br', 'CC(C)C', 'C[C@@H](NC(N)=O)c1ccccc1Br', 'CC(C)CNC(N)=O', 'CCc1ccccc1Br', 'Brc1ccccc1', 'CCNC(=O)NCC(C)C']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccccc1.