['CC=O', 'NCc1ccc(-n2ccnc2)c(F)c1', 'CC(N)=O', 'Cc1ccc(-n2ccnc2)c(F)c1', 'CNC(C)=O', 'Fc1ccccc1-n1ccnc1', 'c1c[nH]cn1', 'CC(=O)NCc1cccc(F)c1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccc(-n2ccnc2)cc1.