['CCc1ccccc1', 'C[C@H]1Cc2[nH]c(=S)[nH]c(=O)c2S1', 'c1ccccc1', 'CCn1c(=S)[nH]c2c(c1=O)S[C@@H](C)C2']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is O=c1c2c([nH]c(=S)n1CCc1ccccc1)CCS2.