['COCCOCCN', 'Cc1[nH]c(=S)sc1CC=O', 'CO', 'CCOCCNC(=O)Cc1sc(=S)[nH]c1C', 'CCOC', 'Cc1[nH]c(=S)sc1CC(=O)NCCO', 'COCCO', 'CCNC(=O)Cc1sc(=S)[nH]c1C', 'CCOCCOC', 'Cc1[nH]c(=S)sc1CC(N)=O', 'Cc1csc(=S)[nH]1', 'COCCOCCNC(C)=O']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is S=c1[nH]ccs1.