['CC(C)(C)NCC=O', 'CC(N)Cc1ccc(Br)cc1', 'CC(C)(C)NCC(N)=O', 'CCCc1ccc(Br)cc1', 'CC(C)(C)N', 'CC(=O)NC(C)Cc1ccc(Br)cc1', 'CC(C)C', 'CC(Cc1ccc(Br)cc1)NC(=O)CN', 'Brc1ccccc1', 'CC(C)NC(=O)CNC(C)(C)C']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccccc1.