['CN(C)CCN', 'CCCc1ccc(C=O)cc1', 'CCN(C)C', 'CCCc1ccc(C(N)=O)cc1', 'CNC', 'CCCc1ccc(C(=O)NCC)cc1', 'CN(C)CCNC=O', 'CCCc1ccccc1', 'CCC', 'CN(C)CCNC(=O)c1ccccc1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccccc1.