['O=Cc1ccc(F)cc1', 'CCOCCCNC(=S)NCCN', 'CC', 'O=C(NCCNC(=S)NCCCO)c1ccc(F)cc1', 'CCO', 'CCCNC(=S)NCCNC(=O)c1ccc(F)cc1', 'CCCOCC', 'NC(=S)NCCNC(=O)c1ccc(F)cc1', 'CCOCCCNC(N)=S', 'CCNC(=O)c1ccc(F)cc1', 'NC(=O)c1ccc(F)cc1', 'CCNC(=S)NCCCOCC', 'Fc1ccccc1', 'CCOCCCNC(=S)NCCNC=O']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccccc1.