['CC(C)(C)SCC=O', 'Nc1n[nH]c(C(F)(F)F)n1', 'CC(C)C', 'O=C(CS)Nc1n[nH]c(C(F)(F)F)n1', 'CC(C)(C)S', 'CC(=O)Nc1n[nH]c(C(F)(F)F)n1', 'CC(C)(C)SCC(N)=O', 'FC(F)(F)c1ncn[nH]1', 'FC(F)F', 'CC(C)(C)SCC(=O)Nc1nc[nH]n1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1nc[nH]n1.