['C[C@H]1CCCO1', 'Cc1ccc2nc(N)sc2c1', 'NC[C@H]1CCCO1', 'Cc1ccc2ncsc2c1', 'C1CCOC1', 'CNc1nc2ccc(C)cc2s1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccc2sc(NC[C@H]3CCCO3)nc2c1.