['CO', 'O=CCC[C@H](NC(=O)c1ccc(-c2ccccc2)cc1)C(=O)O', 'COC(=O)CC[C@H](N)C(=O)O', 'O=Cc1ccc(-c2ccccc2)cc1', 'COC(=O)CCCC(=O)O', 'NC(=O)c1ccc(-c2ccccc2)cc1', 'c1ccc(-c2ccccc2)cc1', 'COC(=O)CC[C@H](NC=O)C(=O)O', 'c1ccccc1', 'COC(=O)CC[C@H](NC(=O)c1ccccc1)C(=O)O']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccc(-c2ccccc2)cc1.