['CC=O', 'NCCC(=O)/N=c1\\sccn1Cc1ccccc1F', 'CC(N)=O', 'CCC(=O)/N=c1\\sccn1Cc1ccccc1F', 'Cc1ccccc1F', 'CC(=O)NCCC(=O)/N=c1/[nH]ccs1', 'Fc1ccccc1', 'CC(=O)NCCC(=O)/N=c1\\sccn1C']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is N=c1sccn1Cc1ccccc1.