['CCS(=O)(=O)N(C)CCCN', 'O=Cc1cccnc1SC(F)(F)F', 'CCS(=O)(=O)NC', 'CCCNC(=O)c1cccnc1SC(F)(F)F', 'CCCN(C)S(=O)(=O)CC', 'NC(=O)c1cccnc1SC(F)(F)F', 'CC[SH](=O)=O', 'CNCCCNC(=O)c1cccnc1SC(F)(F)F', 'FC(F)(F)Sc1ccccn1', 'CCS(=O)(=O)N(C)CCCNC=O', 'FC(F)(F)S', 'CCS(=O)(=O)N(C)CCCNC(=O)c1cccnc1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccncc1.