['N#CCCNCCC#N', 'O=CCn1c(-c2cccs2)noc1=O', 'CCC#N', 'N#CCCNC(=O)Cn1c(-c2cccs2)noc1=O', 'O=c1[nH]c(-c2cccs2)no1', 'CC(=O)N(CCC#N)CCC#N', 'c1ccsc1', 'N#CCCN(CCC#N)C(=O)Cn1cnoc1=O']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is O=c1[nH]c(-c2cccs2)no1.