['CC(=O)O', 'SCc1ncc(-c2ccccc2)o1', 'O=C(O)CS', 'Cc1ncc(-c2ccccc2)o1', 'CSCC(=O)O', 'c1ccc(-c2cnco2)cc1', 'c1ccccc1', 'O=C(O)CSCc1ncco1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccc(-c2cnco2)cc1.