['CCN', 'N#C/C(C=O)=C/c1ccc(-c2cccc(C(F)(F)F)c2)o1', 'CC', 'N#C/C(=C/c1ccc(-c2cccc(C(F)(F)F)c2)o1)C(N)=O', 'CCNC(=O)CC#N', 'Cc1ccc(-c2cccc(C(F)(F)F)c2)o1', 'FC(F)F', 'CCNC(=O)/C(C#N)=C\\c1ccc(-c2ccccc2)o1', 'FC(F)(F)c1ccccc1', 'CCNC(=O)/C(C#N)=C\\c1ccco1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccc(-c2ccco2)cc1.