['CCO', 'CN(CCC=O)Cc1cscn1', 'CC', 'CN(CCC(=O)O)Cc1cscn1', 'CCOC(=O)CC', 'CNCc1cscn1', 'Cc1cscn1', 'CCOC(=O)CCNC', 'c1cscn1', 'CCOC(=O)CCN(C)C']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1cscn1.