['CCO', 'COc1ccc(NC(=O)N(C)CC=O)cc1', 'CCOC(=O)CNC', 'COc1ccc(NC=O)cc1', 'COc1ccc(N)cc1', 'CCOC(=O)CN(C)C=O', 'CC', 'COc1ccc(NC(=O)N(C)CC(=O)O)cc1', 'CO', 'CCOC(=O)CN(C)C(=O)Nc1ccccc1', 'CCOC(C)=O', 'CNC(=O)Nc1ccc(OC)cc1', 'COc1ccccc1', 'CCOC(=O)CN(C)C(N)=O']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccccc1.