['O=Cc1ccccc1', 'CC[C@@H](C)[C@@H](N)C(=O)NNC(=O)[C@@H](C)Oc1cccc(Br)c1', 'Oc1cccc(Br)c1', 'CCC(=O)NNC(=O)[C@H](NC(=O)c1ccccc1)[C@H](C)CC', 'Brc1ccccc1', 'CC[C@@H](C)[C@@H](NC(=O)c1ccccc1)C(=O)NNC(=O)[C@@H](C)O', 'NC(=O)c1ccccc1', 'CC[C@@H](C)CC(=O)NNC(=O)[C@@H](C)Oc1cccc(Br)c1', 'c1ccccc1', 'CC[C@@H](C)[C@@H](NC=O)C(=O)NNC(=O)[C@@H](C)Oc1cccc(Br)c1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is O=C(CNC(=O)c1ccccc1)NNC(=O)COc1ccccc1.