['CN[C@@H]1COC[C@H]1O', 'Cc1nnc2n1CCCC2', 'O[C@H]1CCOC1', 'CNCc1nnc2n1CCCC2', 'CN(C)[C@@H]1COC[C@H]1O', 'c1nnc2n1CCCC2']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is C1CCn2c(nnc2CN[C@H]2CCOC2)C1.