['CC(C)C=O', 'NCCNC(=O)/C=C/c1ccc(SC(F)(F)F)cc1', 'CC(C)C(=O)NCCN', 'O=C/C=C/c1ccc(SC(F)(F)F)cc1', 'CC(C)C(N)=O', 'CCNC(=O)/C=C/c1ccc(SC(F)(F)F)cc1', 'CCNC(=O)C(C)C', 'NC(=O)/C=C/c1ccc(SC(F)(F)F)cc1', 'CC(=O)NCCNC(=O)C(C)C', 'Cc1ccc(SC(F)(F)F)cc1', 'FC(F)(F)S', 'CC(C)C(=O)NCCNC(=O)/C=C/c1ccccc1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccccc1.