['NCCCC(=O)O', 'CCc1ccc(OCC=O)cc1', 'CCc1ccc(O)cc1', 'CC(=O)NCCCC(=O)O', 'CCc1ccccc1', 'O=C(O)CCCNC(=O)CO', 'CCCC(=O)O', 'CCc1ccc(OCC(N)=O)cc1', 'CC', 'O=C(O)CCCNC(=O)COc1ccccc1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccccc1.