['CC(C)CN', 'CN(CCCC=O)S(=O)(=O)c1ccc(F)cc1', 'CC(C)C', 'CN(CCCC(N)=O)S(=O)(=O)c1ccc(F)cc1', 'CCCC(=O)NCC(C)C', 'CNS(=O)(=O)c1ccc(F)cc1', 'O=[SH](=O)c1ccc(F)cc1', 'CNCCCC(=O)NCC(C)C']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccccc1.