['CC(C)CN', 'C[C@@H](C=O)NC(=O)c1ccccc1', 'O=Cc1ccccc1', 'CC(C)CNC(=O)[C@H](C)N', 'CC(C)C', 'C[C@H](NC(=O)c1ccccc1)C(N)=O', 'CCC(=O)NCC(C)C', 'NC(=O)c1ccccc1', 'c1ccccc1', 'CC(C)CNC(=O)[C@H](C)NC=O']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccccc1.