['C#CC', 'C#CCOc1ccccc1/C=N\\NC(=O)CCCCC(=O)N/N=C\\c1ccccc1O', 'C#CCO', 'C#CCOc1ccccc1/C=N\\NC(=O)CCCCC(=O)N/N=C\\c1ccccc1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is O=C(CCCCC(=O)N/N=C\c1ccccc1)N/N=C\c1ccccc1.