['Oc1ccccc1F', 'CC(=O)NNC(=O)CCNS(=O)(=O)/C=C/c1ccccc1', 'Fc1ccccc1', 'O=C(CO)NNC(=O)CCNS(=O)(=O)/C=C/c1ccccc1', 'NS(=O)(=O)/C=C/c1ccccc1', 'CCC(=O)NNC(=O)COc1ccccc1F', 'O=[SH](=O)/C=C/c1ccccc1', 'NCCC(=O)NNC(=O)COc1ccccc1F']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is O=C(CCNS(=O)(=O)/C=C/c1ccccc1)NNC(=O)COc1ccccc1.