['CC(=O)O', 'Cn1c(S)nnc1-c1cccc(Cl)c1', 'O=C(O)CS', 'Cn1cnnc1-c1cccc(Cl)c1', 'Clc1ccccc1', 'Cn1cnnc1SCC(=O)O']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccc(-c2nnc[nH]2)cc1.