['CC(C)(C)N', 'O=CNC(=O)CN1CCCc2cc(F)ccc21', 'CC(C)(C)NC=O', 'NC(=O)CN1CCCc2cc(F)ccc21', 'CC(C)(C)NC(N)=O', 'O=CCN1CCCc2cc(F)ccc21', 'CC(C)C', 'NC(=O)NC(=O)CN1CCCc2cc(F)ccc21', 'CC(=O)NC(=O)NC(C)(C)C', 'Fc1ccc2c(c1)CCCN2']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccc2c(c1)CCCN2.