['Cc1ccc(C=O)cc1', 'N/C(=C/c1cccc(Br)c1)C(=O)O', 'Cc1ccccc1', 'O=CN/C(=C/c1cccc(Br)c1)C(=O)O', 'Cc1cccc(Br)c1', 'Cc1ccc(C(=O)NCC(=O)O)cc1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is O=C(N/C=C/c1ccccc1)c1ccccc1.