['CCO', 'Cc1[nH]cc(-c2cccs2)c1C=O', 'CC', 'Cc1[nH]cc(-c2cccs2)c1C(=O)O', 'CCOC=O', 'Cc1cc(-c2cccs2)c[nH]1', 'c1ccsc1', 'CCOC(=O)c1cc[nH]c1C']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1csc(-c2cc[nH]c2)c1.