['CCc1ccc(N)cc1', 'CC(C)[C@H](C=O)NC(N)=O', 'NC=O', 'CCc1ccc(NC(=O)[C@H](N)C(C)C)cc1', 'NC(N)=O', 'CCc1ccc(NC(=O)CC(C)C)cc1', 'CCc1ccccc1', 'CC(C)[C@@H](NC(N)=O)C(N)=O', 'CC', 'CC(C)[C@@H](NC(N)=O)C(=O)Nc1ccccc1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccccc1.