['CC(C)CN', 'O=CCc1csc(N2CCCC2=O)n1', 'CC(C)C', 'NC(=O)Cc1csc(N2CCCC2=O)n1', 'CC(=O)NCC(C)C', 'O=C1CCCN1c1nccs1', 'O=C1CCCN1', 'CC(C)CNC(=O)Cc1cscn1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is O=C1CCCN1c1nccs1.