['CC(C)(C)O', 'O=CN(CCn1cccc1)CC(=O)O', 'CC(C)(C)OC=O', 'O=C(O)CNCCn1cccc1', 'CC(C)C', 'O=C(O)CN(CCn1cccc1)C(=O)O', 'CCn1cccc1', 'CC(C)(C)OC(=O)NCC(=O)O', 'CC(=O)O', 'CC(C)(C)OC(=O)NCCn1cccc1', 'c1cc[nH]c1', 'CCN(CC(=O)O)C(=O)OC(C)(C)C']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1cc[nH]c1.