['CC(N)C(=O)NC(C)(C)C', 'O=Cc1cc2c(s1)-c1ccccc1OC2', 'CC(C)(C)N', 'CC(C=O)NC(=O)c1cc2c(s1)-c1ccccc1OC2', 'CCC(=O)NC(C)(C)C', 'NC(=O)c1cc2c(s1)-c1ccccc1OC2', 'CC(C)C', 'CC(NC(=O)c1cc2c(s1)-c1ccccc1OC2)C(N)=O', 'CC(NC=O)C(=O)NC(C)(C)C', 'c1ccc2c(c1)OCc1ccsc1-2']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccc2c(c1)OCc1ccsc1-2.