['CCCCO', 'CN(CC=O)Cc1csc(Br)c1', 'CCCC', 'CN(CC(=O)O)Cc1csc(Br)c1', 'CCCCOC(C)=O', 'CNCc1csc(Br)c1', 'Cc1csc(Br)c1', 'CCCCOC(=O)CNC', 'Brc1cccs1', 'CCCCOC(=O)CN(C)C']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccsc1.