['CC(C)N', 'Cc1nn(CCO)c(C)c1CNCCC=O', 'CC(C)NC(=O)CCN', 'Cc1nn(CCO)c(C)c1C', 'CCC(=O)NC(C)C', 'Cc1nn(CCO)c(C)c1CN', 'CCC', 'Cc1nn(CCO)c(C)c1CNCCC(N)=O', 'CCO', 'Cc1n[nH]c(C)c1CNCCC(=O)NC(C)C', 'CNCCC(=O)NC(C)C', 'Cc1cc(C)n(CCO)n1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1cn[nH]c1.