['CCCCS(N)(=O)=O', 'Cc1ccccc1N1CCOCC1', 'CCCC[SH](=O)=O', 'NCc1ccccc1N1CCOCC1', 'C1COCCN1', 'CCCCS(=O)(=O)NCc1ccccc1', 'CCCCS(=O)(=O)NC', 'c1ccc(N2CCOCC2)cc1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccc(N2CCOCC2)cc1.