['NC(=O)NCC(F)(F)F', 'O=CCSc1nccc(C(F)(F)F)n1', 'O=CNCC(F)(F)F', 'NC(=O)CSc1nccc(C(F)(F)F)n1', 'NCC(F)(F)F', 'O=CNC(=O)CSc1nccc(C(F)(F)F)n1', 'CC(F)(F)F', 'NC(=O)NC(=O)CSc1nccc(C(F)(F)F)n1', 'FC(F)(F)c1ccnc(S)n1', 'CC(=O)NC(=O)NCC(F)(F)F', 'FC(F)F', 'O=C(CSc1ncccn1)NC(=O)NCC(F)(F)F', 'FC(F)(F)c1ccncn1', 'O=C(CS)NC(=O)NCC(F)(F)F']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1cncnc1.