['CC(C)COCCCN', 'C[C@H](c1ccc(-n2cncn2)cc1)N(C)C=O', 'CC(C)COCCCNC=O', 'CN[C@H](C)c1ccc(-n2cncn2)cc1', 'CC(C)C', 'C[C@H](c1ccc(-n2cncn2)cc1)N(C)C(=O)NCCCO', 'CC(C)CO', 'CCCNC(=O)N(C)[C@H](C)c1ccc(-n2cncn2)cc1', 'CCCOCC(C)C', 'C[C@H](c1ccc(-n2cncn2)cc1)N(C)C(N)=O', 'CCc1ccc(-n2cncn2)cc1', 'CNC(=O)NCCCOCC(C)C', 'c1ccc(-n2cncn2)cc1', 'CCN(C)C(=O)NCCCOCC(C)C', 'c1nc[nH]n1', 'CC(C)COCCCNC(=O)N(C)[C@H](C)c1ccccc1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccc(-n2cncn2)cc1.