['CC(C)(C)O', 'CCCCn1c(SCC=O)n[nH]c1=O', 'CC(C)C', 'CCCCn1c(SCC(=O)O)n[nH]c1=O', 'CC(=O)OC(C)(C)C', 'CCCCn1c(S)n[nH]c1=O', 'CCCC', 'CC(C)(C)OC(=O)CSc1n[nH]c(=O)[nH]1', 'CC(C)(C)OC(=O)CS', 'CCCCn1cn[nH]c1=O']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is O=c1[nH]cn[nH]1.