['CCCCO', 'Nn1c(SCC=O)nnc1-c1ccco1', 'CCCC', 'Nn1c(SCC(=O)O)nnc1-c1ccco1', 'CCCCOC(C)=O', 'Nn1c(S)nnc1-c1ccco1', 'CCCCOC(=O)CS', 'Nn1cnnc1-c1ccco1', 'c1ccoc1', 'CCCCOC(=O)CSc1nncn1N']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1coc(-c2nnc[nH]2)c1.