['CC(C)(C)C=O', 'NCC(=O)/N=c1\\sccn1Cc1ccccc1F', 'CC(C)(C)C(N)=O', 'CC(=O)/N=c1\\sccn1Cc1ccccc1F', 'Cc1ccccc1F', 'CC(C)(C)C(=O)NCC(=O)/N=c1/[nH]ccs1', 'Fc1ccccc1', 'Cn1ccs/c1=N\\C(=O)CNC(=O)C(C)(C)C']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is N=c1sccn1Cc1ccccc1.