['CC(C)COCCCN', 'O=CNCCc1c[nH]c2ccccc12', 'CC(C)COCCCNC=O', 'NCCc1c[nH]c2ccccc12', 'CC(C)C', 'O=C(NCCCO)NCCc1c[nH]c2ccccc12', 'CC(C)CO', 'CCCNC(=O)NCCc1c[nH]c2ccccc12', 'CCCOCC(C)C', 'NC(=O)NCCc1c[nH]c2ccccc12', 'CCc1c[nH]c2ccccc12', 'CC(C)COCCCNC(N)=O', 'c1ccc2[nH]ccc2c1', 'CCNC(=O)NCCCOCC(C)C']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccc2[nH]ccc2c1.