['CCO', 'O=C[C@H]1CCCN(c2ccc(Cl)nn2)C1', 'CC', 'O=C(O)[C@H]1CCCN(c2ccc(Cl)nn2)C1', 'Clc1cccnn1', 'CCOC(=O)[C@H]1CCCNC1', 'CCOC=O', 'Clc1ccc(N2CCCCC2)nn1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1cnnc(N2CCCCC2)c1.