['CCO', 'C/C(N)=C(\\C=O)C(=O)Nc1c(C)cc(C)cc1C', 'Cc1cc(C)c(N)c(C)c1', 'CCOC(=O)/C(C=O)=C(\\C)N', 'CC', 'C/C(N)=C(\\C(=O)O)C(=O)Nc1c(C)cc(C)cc1C', 'Cc1cc(C)cc(C)c1', 'CCOC(=O)/C(C(N)=O)=C(\\C)N', 'CCN', 'CCOC(=O)CC(=O)Nc1c(C)cc(C)cc1C']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccccc1.