['CC(C)CCCN', 'Cn1nccc1CNC=O', 'Cn1nccc1CN', 'CC(C)CCCNC=O', 'CCCC(C)C', 'Cn1nccc1CNC(N)=O', 'Cc1ccnn1C', 'CC(C)CCCNC(N)=O', 'Cn1cccn1', 'CNC(=O)NCCCC(C)C']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1cn[nH]c1.