['CCC', 'O=Cc1cn[nH]c1-c1ccc(O)cc1', 'CC(C)O', 'O=Cc1cn[nH]c1-c1ccccc1', 'O=Cc1cn[nH]c1', 'CC(C)Oc1ccccc1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccc(-c2ccn[nH]2)cc1.