['OCc1ccccc1', 'CC[C@H](C)[C@H](NC=O)C(=O)NCC(C)C', 'O=COCc1ccccc1', 'CC[C@H](C)[C@H](N)C(=O)NCC(C)C', 'CC(C)CN', 'CC[C@H](C)[C@@H](C=O)NC(=O)OCc1ccccc1', 'Cc1ccccc1', 'CC[C@H](C)[C@H](NC(=O)O)C(=O)NCC(C)C', 'NC(=O)OCc1ccccc1', 'CC[C@H](C)CC(=O)NCC(C)C', 'CC(C)C', 'CC[C@H](C)[C@H](NC(=O)OCc1ccccc1)C(N)=O', 'c1ccccc1', 'CC[C@H](C)[C@H](NC(=O)OC)C(=O)NCC(C)C']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccccc1.