['CNC', 'O=CCCNC(=O)NC1CC1c1ccccc1', 'CN(C)C(=O)CCN', 'O=CNC1CC1c1ccccc1', 'CN(C)C(=O)CCNC=O', 'NC1CC1c1ccccc1', 'CCC(=O)N(C)C', 'NC(=O)NC1CC1c1ccccc1', 'c1ccc(C2CC2)cc1', 'CN(C)C(=O)CCNC(N)=O', 'c1ccccc1', 'CN(C)C(=O)CCNC(=O)NC1CC1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccc(C2CC2)cc1.